2-Methyl-1-butene

0.6504 @ 20 °C/4 °C

0.06504 @ 20°C

Sol in alcohol, ether, benzene

In water, 130 mg/l @ 20 °C.

less than 20 °F (NFPA, 2010)

Flash point < -7 °C

BELOW -20 °F (BELOW -7 °C) (CLOSED CUP)

31.2 °C

31.04 °C @760 [mm Hg]

-137.5 °C

-137.5 °C

610.0 [mmHg]

610 mm Hg @ 25 °C

610 [mm Hg] @20 °C

Isopentenes appears as a colorless liquid with a pleasant odor. A mixture of isomers. Insoluble in water and less dense than water. Hence floats on water. Vapors are heavier than air. Used as a solvent and to make other chemicals.

2-methyl-1-butene appears as a colorless volatile liquid with a disagreeable odor. Insoluble in water and less dense than water. Vapors are heavier than air. Used to make other chemicals.

Liquid

Liquid; Gas Vapor

Colorless volatile liquid with a disagreeable odor; [Hawley] Colorless liquid; bp = 31-32 deg C; [MSDSonline]

Danger

H224 (79%): Extremely flammable liquid and vapor [Danger Flammable liquids]；H225 (21%): Highly Flammable liquid and vapor [Danger Flammable liquids]；H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]；H304 (81.9%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]；H315 (81.9%): Causes skin irritation [Warning Skin corrosion/irritation]；H336 (81.9%): May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]；H341 (81.9%): Suspected of causing genetic defects [Warning Germ cell mutagenicity]；H351 (81.9%): Suspected of causing cancer [Warning Carcinogenicity]；H411 (81.9%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

P203, P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P273, P280, P301+P316, P301+P317, P302+P352, P303+P361+P353, P304+P340, P318, P319, P321, P330, P331, P332+P317, P362+P364, P370+P378, P391, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 138 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.；Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

Chemical: 1-Butene, 2-methyl-

Butene, 2-methyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Butene, 2-methyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

1-Butene, 2-methyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 1-Butene, 2-methyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 15-09-2010 https://echa.europa.eu/registration-dossier/-/registered-dossier/12623

1-Butene, 2-methyl-: Does not have an individual approval but may be used under an appropriate group standard

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

Flammable Liquid

Flammable Liquid

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas (sewers, basements, tanks, etc.). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids will float on water. Substance may be transported hot. For hybrid vehicles, ERG Guide 147 (lithium ion or sodium ion batteries) or ERG Guide 138 (sodium batteries) should also be consulted. If molten aluminum is involved, refer to ERG Guide 169. (ERG, 2024)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas (sewers, basements, tanks, etc.). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids will float on water. Substance may be transported hot. For hybrid vehicles, ERG Guide 147 (lithium ion or sodium ion batteries) or ERG Guide 138 (sodium batteries) should also be consulted. If molten aluminum is involved, refer to ERG Guide 169. (ERG, 2024)

· HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.；· Vapors may form explosive mixtures with air.；· Vapors may travel to source of ignition and flash back.；· Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas (sewers, basements, tanks, etc.).；· Vapor explosion hazard indoors, outdoors or in sewers.；· Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.；· Runoff to sewer may create fire or explosion hazard.；· Containers may explode when heated.；· Many liquids will float on water.；· Substance may be transported hot.；· For hybrid vehicles, GUIDE 147 (lithium ion or sodium ion batteries) or GUIDE 138 (sodium batteries) should also be consulted.；· If molten aluminum is involved, refer to GUIDE 169.

· HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.；· Vapors may form explosive mixtures with air.；· Vapors may travel to source of ignition and flash back.；· Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas (sewers, basements, tanks, etc.).；· Vapor explosion hazard indoors, outdoors or in sewers.；· Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.；· Runoff to sewer may create fire or explosion hazard.；· Containers may explode when heated.；· Many liquids will float on water.；· Substance may be transported hot.；· For hybrid vehicles, GUIDE 147 (lithium ion or sodium ion batteries) or GUIDE 138 (sodium batteries) should also be consulted.；· If molten aluminum is involved, refer to GUIDE 169.

HIGHLY FLAMMABLE, DANGEROUS FIRE ... RISK

Very dangerous fire hazard when exposed to heat, flame, or oxidizers.

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；CAUTION: Petroleum crude oil (UN1267) may contain TOXIC hydrogen sulphide gas. Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas. Runoff from fire control or dilution water may cause environmental contamination. (ERG, 2024)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；CAUTION: Petroleum crude oil (UN1267) may contain TOXIC hydrogen sulphide gas. Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas. Runoff from fire control or dilution water may cause environmental contamination. (ERG, 2024)

CAUTION: Petroleum crude oil (UN1267) may contain TOXIC hydrogen sulphide gas.；· Inhalation or contact with material may irritate or burn skin and eyes.；· Fire may produce irritating, corrosive and/or toxic gases.；· Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas.；· Runoff from fire control or dilution water may cause environmental contamination.

CAUTION: Petroleum crude oil (UN1267) may contain TOXIC hydrogen sulphide gas.；· Inhalation or contact with material may irritate or burn skin and eyes.；· Fire may produce irritating, corrosive and/or toxic gases.；· Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas.；· Runoff from fire control or dilution water may cause environmental contamination.

2371 128

2459 128

Hydrocarbons, Aliphatic Unsaturated

Hydrocarbons, Aliphatic Unsaturated

Highly Flammable

Highly Flammable

ISOPENTENES may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions. May undergo slow autoxidation upon exposure to the air to form peroxides. These peroxide and polyperoxide substances are unstable and liable to detonation.

The unsaturated aliphatic hydrocarbons, such as 2-METHYL-1-BUTENE, are generally much more reactive than the alkanes. Strong oxidizers may react vigorously with them. Reducing agents can react exothermically to release gaseous hydrogen. In the presence of various catalysts (such as acids) or initiators, compounds in this class can undergo very exothermic addition polymerization reactions.

/GUIDE 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ Fire or Explosion: HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a "P" may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. Substances may be transported hot.

/GUIDE 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ Health: Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

/GUIDE 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak area for at least 50 meters (150 feet) in all directions. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate closed spaces before entering.

/GUIDE 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing will only provide limited protection.

For more DOT Emergency Guidelines (Complete) data for 2-METHYL-1-BUTENE (8 total), please visit the HSDB record page.

Isopentenes

UN2371

Class 3 Flammable and combustible liquid (49 eCFR § 173.120)

PG I: the degree of danger presented by the material is great；For more information about the packing group assignment, please visit 49 eCFR § 173

2-Methyl-1-butene

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient. CAUTION: For mixtures containing alcohol or polar solvent, alcohol-resistant foam may be more effective.；SMALL FIRE: Dry chemical, CO2, water spray or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.；LARGE FIRE: Water spray, fog or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam. Avoid aiming straight or solid streams directly onto the product. If it can be done safely, move undamaged containers away from the area around the fire.；FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. For petroleum crude oil, do not spray water directly into a breached tank car. This can lead to a dangerous boil over. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2024)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient. CAUTION: For mixtures containing alcohol or polar solvent, alcohol-resistant foam may be more effective.；SMALL FIRE: Dry chemical, CO2, water spray or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.；LARGE FIRE: Water spray, fog or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam. Avoid aiming straight or solid streams directly onto the product. If it can be done safely, move undamaged containers away from the area around the fire.；FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. For petroleum crude oil, do not spray water directly into a breached tank car. This can lead to a dangerous boil over. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2024)

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.；· Keep unauthorized personnel away.；· Stay upwind, uphill and/or upstream.；· Ventilate closed spaces before entering, but only if properly trained and equipped.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.；· All equipment used when handling the product must be grounded.；· Do not touch or walk through spilled material.；· Stop leak if you can do it without risk.；· Prevent entry into waterways, sewers, basements or confined areas.；· A vapor-suppressing foam may be used to reduce vapors.；· Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers.；· Use clean, non-sparking tools to collect absorbed material.；Large Spill；· Dike far ahead of liquid spill for later disposal.；· Water spray may reduce vapor, but may not prevent ignition in closed spaces.

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.；· Keep unauthorized personnel away.；· Stay upwind, uphill and/or upstream.；· Ventilate closed spaces before entering, but only if properly trained and equipped.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.；· All equipment used when handling the product must be grounded.；· Do not touch or walk through spilled material.；· Stop leak if you can do it without risk.；· Prevent entry into waterways, sewers, basements or confined areas.；· A vapor-suppressing foam may be used to reduce vapors.；· Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers.；· Use clean, non-sparking tools to collect absorbed material.；Large Spill；· Dike far ahead of liquid spill for later disposal.；· Water spray may reduce vapor, but may not prevent ignition in closed spaces.

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；Refer to the "General First Aid" section. Specific First Aid: Wash skin with soap and water. In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin. (ERG, 2024)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；Refer to the "General First Aid" section. Specific First Aid: Wash skin with soap and water. In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin. (ERG, 2024)

General First Aid:；· Call 911 or emergency medical service.；· Ensure that medical personnel are aware of the material(s) involved, take precautions to protect themselves and avoid contamination.；· Move victim to fresh air if it can be done safely.；· Administer oxygen if breathing is difficult.；· If victim is not breathing:；-- DO NOT perform mouth-to-mouth resuscitation; the victim may have ingested or inhaled the substance.；-- If equipped and pulse detected, wash face and mouth, then give artificial respiration using a proper respiratory medical device (bag-valve mask, pocket mask equipped with a one-way valve or other device).；-- If no pulse detected or no respiratory medical device available, provide continuous compressions. Conduct a pulse check every two minutes or monitor for any signs of spontaneous respirations.；· Remove and isolate contaminated clothing and shoes.；· For minor skin contact, avoid spreading material on unaffected skin.；· In case of contact with substance, remove immediately by flushing skin or eyes with running water for at least 20 minutes.；· For severe burns, immediate medical attention is required.；· Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed.；· Keep victim calm and warm.；· Keep victim under observation.；· For further assistance, contact your local Poison Control Center.；· Note: Basic Life Support (BLS) and Advanced Life Support (ALS) should be done by trained professionals.；Specific First Aid:；· Wash skin with soap and water.

General First Aid:；· Call 911 or emergency medical service.；· Ensure that medical personnel are aware of the material(s) involved, take precautions to protect themselves and avoid contamination.；· Move victim to fresh air if it can be done safely.；· Administer oxygen if breathing is difficult.；· If victim is not breathing:；-- DO NOT perform mouth-to-mouth resuscitation; the victim may have ingested or inhaled the substance.；-- If equipped and pulse detected, wash face and mouth, then give artificial respiration using a proper respiratory medical device (bag-valve mask, pocket mask equipped with a one-way valve or other device).；-- If no pulse detected or no respiratory medical device available, provide continuous compressions. Conduct a pulse check every two minutes or monitor for any signs of spontaneous respirations.；· Remove and isolate contaminated clothing and shoes.；· For minor skin contact, avoid spreading material on unaffected skin.；· In case of contact with substance, remove immediately by flushing skin or eyes with running water for at least 20 minutes.；· For severe burns, immediate medical attention is required.；· Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed.；· Keep victim calm and warm.；· Keep victim under observation.；· For further assistance, contact your local Poison Control Center.；· Note: Basic Life Support (BLS) and Advanced Life Support (ALS) should be done by trained professionals.；Specific First Aid:；· Wash skin with soap and water.

· Wear positive pressure self-contained breathing apparatus (SCBA).；· Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.

· Wear positive pressure self-contained breathing apparatus (SCBA).；· Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material.；LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2024)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material.；LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2024)

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 50 meters (150 feet) in all directions.；LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).；FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 50 meters (150 feet) in all directions.；LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).；FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Immediate precautionary measure；· Isolate spill or leak area for at least 50 meters (150 feet) in all directions.；Large Spill；· Consider initial downwind evacuation for at least 300 meters (1000 feet).；Fire；· If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

Immediate precautionary measure；· Isolate spill or leak area for at least 50 meters (150 feet) in all directions.；Large Spill；· Consider initial downwind evacuation for at least 300 meters (1000 feet).；Fire；· If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

120 [mg/m3]

1300 [mg/m3]

7900 [mg/m3]

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2024)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:；Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2024)

CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient.；CAUTION: For mixtures containing alcohol or polar solvent, alcohol-resistant foam may be more effective.；Small Fire；· Dry chemical, CO2, water spray or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.；Large Fire；· Water spray, fog or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.；· Avoid aiming straight or solid streams directly onto the product.；· If it can be done safely, move undamaged containers away from the area around the fire.；Fire Involving Tanks, Rail Tank Cars or Highway Tanks；· Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles.；· Cool containers with flooding quantities of water until well after fire is out.；· For petroleum crude oil, do not spray water directly into a breached tank car. This can lead to a dangerous boil over.；· Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.；· ALWAYS stay away from tanks in direct contact with flames.；· For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient.；CAUTION: For mixtures containing alcohol or polar solvent, alcohol-resistant foam may be more effective.；Small Fire；· Dry chemical, CO2, water spray or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.；Large Fire；· Water spray, fog or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.；· Avoid aiming straight or solid streams directly onto the product.；· If it can be done safely, move undamaged containers away from the area around the fire.；Fire Involving Tanks, Rail Tank Cars or Highway Tanks；· Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles.；· Cool containers with flooding quantities of water until well after fire is out.；· For petroleum crude oil, do not spray water directly into a breached tank car. This can lead to a dangerous boil over.；· Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.；· ALWAYS stay away from tanks in direct contact with flames.；· For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 68(SRC), determined from a structure estimation method(2), indicates that 2-methyl-1-butene should have high mobility in soil(SRC). Volatilization of 2-methyl-1-butene from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.43 atm-cu m/mole(SRC) calculated from its water solubility(4) and vapor pressure(3). The potential for volatilization of 2-methyl-1-butene from dry soil surfaces may exist(SRC) based upon a vapor pressure of 610 mm Hg(3). While biodegradation data in soil were not located, 2-methyl-1-butene's relatively low molecular weight, hydrocarbon structure suggests that biodegradation is expected to be an important fate process(5).

AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 68(SRC), determined from an estimation method(2), indicates that 2-methyl-1-butene is not expected to adsorb to suspended solids and sediment in water(SRC). Volatilization from water surfaces is expected(3) based upon a Henry's Law constant of 0.43 atm-cu m/mole(SRC) calculated from its water solubility(5) and vapor pressure(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 2.4 hours and 3.3 days, respectively(SRC). According to a classification scheme(6), a BCF of 25(SRC) estimated from its estimated log Kow of 2.72(8) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low. While biodegradation data in water were not located, 2-methyl-1-butene's relatively low molecular weight, hydrocarbon structure suggests that biodegradation is expected to be an important fate process(9).

ATMOSPHERIC FATE: 2-Methyl-1-butene which has a vapor pressure of 610 mm Hg at 25 °C(2), is a volatile organic compound and should exist solely as a vapor in the atmosphere(1). It is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals and ozone molecules(SRC); the half-life for the reaction with hydroxyl radicals in air is estimated to be 6.3 hours(SRC), calculated from its rate constant of 6.07X10-11 cu cm/molecule-sec at 25 °C(3). The reaction of 2-methyl-1-butene with ozone is estimated to be much slower than that with hydroxyl radicals and therefore would not markedly alter 2-methyl-1-butene's atmospheric half-life.

Petroleum distillate poisoning may cause nausea, vomiting, cough, pulmonary irritation progressing to pulmonary edema, bloody sputum, and bronchial pneumonia. At high amounts, central nervous system depression may also occur, with symptoms such as weakness, dizziness, slow and shallow respiration, unconsciousness, and convulsions. Petroleum distillates are also irritating to the skin. (A594)

Exhaust from turbojet engines operated at simulated high-altitude flight conditions contained 0.10-5.35 ppmC (ppm carbon) of 2-methyl-1-butene(1). Exhaust from a two-stroke moped contained 0.16 and 0.35 % weight of 2-methyl-1-butene, using an alkalate-based fuel(2). 2-Methyl-1-butene was emitted in the exhaust of 10 four-stroke lawnmower engines at 0.28 and 0.29 % of the total organic emissions, for two different gasolines(3). 2-Methyl-1-butene was emitted in the exhaust of a single-cylinder, production-type engine run on gasoline at 8 ppmC(4).

2-Methyl-1-butene accounted for 0.12 % of the total United Kingdom volatile organic compound emissions (by mass distribution) in 1990(1). Emissions of 2-methyl-1-butene from motor vehicles, measured inside the Van Nuys Tunnel, Los Angeles, CA in 1993 were determined to average 35 mg/L fuel consumed (2). 2-Methyl-1-butene was measured in the exhaust of 67 vehicles representative of the Sydney, Australia fleet at an average concentration of 0.3 %wt/wt non-methane hydrocarbons (3). 2-Methyl-1-butene was detected in the Tingstad Tunnel, Goteborg, Sweden at 0.17 to 0.33 % of the total non-methane volatile hydrocarbons over 5 different sampling days during 1991 and 1992 (4). Light-duty vehicle emissions measured at the Caldecott Tunnel, San Francisco, CA during August and October, 1994, contained 2-methyl-1-butene at 0.23 and 0.34 weight % of total volatile organic compounds; August fuel is low oxygenate concentration, October fuel is high oxygenate concentration(5).

Using a structure estimation method based on molecular connectivity indices(1), the Koc for 2-methyl-1-butene can be estimated to be 68(SRC). According to a classification scheme(2), this estimated Koc value suggests that 2-methyl-1-butene is expected to have high mobility in soil.

SOURCE DOMINATED: Trace amounts of 2-methyl-1-butene were detected in brush fire smoke Cajon Pass, CA. 2-Methyl-1-butene was also detected in samples from an industrial area of Los Angeles County, CA, a Riverside, CA shopping center parking lot, and a nearby busy intersection with three filling stations. The compound was not detected in smog taken from the University of California Riverside campus(1). Air samples taken downwind from a natural gas facility at Piceance Creek in Rio Blanco County, CO, contained 2-methyl-1-butene at 10.7 ppbC(2). Monitoring data was collected from 6 self-service stations in the US (Cincinnati, OH, Phenoix, AZ, Los Angeles, CA) to assess consumer exposure to airborne gasoline components(3). 2-Methyl-1-butene was detected (detection of quantitation = 3 ug/sample) at a range of 0.02-5.2 mg/cu m(3).

URBAN/SUBURBAN: Weekday air samples were taken from 6 to 9 am in 39 US cities during a 1984 through 1986 time period(1). In 822 samples, 2-methyl-1-butene was detected at a median concn of 2.6 ppbC, with a maximum value of 242 ppbC(1). Ambient air from Tulsa, OK contained 2-methyl-1-butene at a range of 0.6-6.4 ppbC(2). During a severe Los Angeles area photochemical smog episode in September 1993, 2-methyl-1-butene was measured in the vapor phase at an average concentration of 1.13 ug/cu m (range not detected to 3.40 ug/cu m)(3). Air samples collected from the industrial area of Houston, TX, contained 2-methyl-1-butene at concentrations of not detected to 53.8, 8.7 to 47.6 and not detected to 3.7 ppbC on separate days in September 1973, January 1974, and April, 1974, respectively (detection limit not reported) (4). Air samples collected by aircraft over Miami in May 1976 contained 2-methyl-1-butene at concentrations of 0.5 and 0.6 ppbC(5). Air samples collected from downtown Los Angeles during morning rush hour, fall 1968, contained 2-methyl-1-butene at 15 ppbC(6). The average concentration of 2-methyl-1-butene in downtown Porto Alegre, Brazil over the period March 1996 to April 1997 is 4.4 mg/cu m (n=46)(7). Concentrations of 2-methyl-1-butene inside and outside the town of Boone, NC (university town, little industry) from September 1981 to October 1982 ranged from 1.5 to 3.7 and 0.3 to 0.5 ppbC, respectively(8). The average concentration of 2-methyl-1-butene is 0.5 ppbv (0.5 weight %; n=140) in the morning air of Sydney, 30 day monitoring period at 3 different sampling sites (1 downwind of central business district, 2 sites downwind of a refinery-petrochemical complex)(9). 2-Methyl-1-butene was present at 2.0 ppb in ambient air samples collected at the Riverside CA County Building of Health and Finance between August 1965 and March 1966 in the early morning(10). The mean concentration of 2-methyl-1-butene measured between 6 and 9 am during the summers of 1984 to 1

RURAL/REMOTE: 2-Methyl-1-butene was detected in the ambient air of Sevier County, TN in the Great Smokey Mountains National Park, ranging from not detected to 1.1 ppbC(1). Air samples collected in the remote Piceance Creek Basin, Colorado contained 2-methyl-1-butene at concentrations from 0.4 to 1.2 ppbC(1). The concentration of 2-methyl-1-butene in air samples collected above a mixed deciduous forest in southern Ontario, Canada in 1993 was 0.002 and 0.003 ppbv in day and nighttime samples, respectively(2). 2-Methyl-1-butene was measured at 0.3 and 0.4 ppbC in ground level air samples collected in an orange grove during May near Dunedin, FL(3). An average 2-methyl-1-butene concentration of 0.2 mg/cu m was measured 30 km southeast of Porto Alegre, Brazil (upwind of the city during sample collection) in November 1996(4). Concentrations of 2-methyl-1-butene at 5 remote locations in the southern Appalachian Mountains of northwestern North Carolina from September 1981 to October 1982 ranged from not detected to 0.4 ppbC(5). 2-Methyl-1-butene was measured in air samples at concentrations from 0.2 to 3.2 ppbC collected from a picnic area at Jones State Forest between January 4 to 6, 1978(6).

2-Methyl-1-butene's production and use in organic synthesis and pesticide formulations(1) result in its release to the environment through various waste streams(SRC). 2-Methyl-1-butene has been identified in emissions from automobiles, turbines, gasoline, and forest fires(2).

A concn of 500 mg/l of 2-methyl-1-butene was biodegraded by activated sludge using a Warburg respirometer at a rate of 50 mg/l of O2 uptake over 20 hrs after an initial lag of 10 hrs(1). This corresponds to a 10% theoretical BOD and suggests that biodegradation may be an important fate process(SRC). While biodegradation data in soil and water were not located, 2-methyl-1-butene's relatively low molecular weight, hydrocarbon structure suggests that biodegradation in both environments is expected to be an important fate process(2).

Chemical: 1-Butene, 2-methyl-

Butene, 2-methyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Butene, 2-methyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

1-Butene, 2-methyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 1-Butene, 2-methyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 15-09-2010 https://echa.europa.eu/registration-dossier/-/registered-dossier/12623

1-Butene, 2-methyl-: Does not have an individual approval but may be used under an appropriate group standard

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

2-Methyl-1-butene

1

10000

Flammable chemical that can be released at a facility.

Used for organic synthesis, in pesticide formulations, and as a solvent; [HSDB]

Farming (Pesticides) [Category: Industry]

Organic synthesis, pesticide formulations

CHEM INT FOR PETROLEUM RESINS (AS MIXED PENTENES)

HYDROCARBON SOLVENT

CHEM INT, EG, FOR ISOPRENE

2023: 9,197,829 lb；2022: 15,843,899 lb；2021: 12,521,073 lb；2020: 8,157,270 lb

2023: 500,000 - <1,000,000 lb；2022: 75,000 - <500,000 lb；2021: 75,000 - <500,000 lb；2020: 75,000 - <500,000 lb

(1977) AT LEAST 4.54X10+9 GRAMS

(1981) 7.43X10+10 G (TOTAL, MIXED PENTENES)

Intermediate

Intermediate

Refinery gas

CATALYTIC CRACKING OR STEAM CRACKING OF PETROLEUM FOLLOWED BY ISOLATION OF C5 FRACTION AND EXTRACTION WITH COLD AQUEOUS SULFURIC ACID

All Other Basic Organic Chemical Manufacturing

Plastics Material and Resin Manufacturing；Petrochemical Manufacturing

1-Butene, 2-methyl-: ACTIVE

Butene, 2-methyl-: ACTIVE