Allene

Toxic Gases & Vapors -> Simple Asphyxiants

Flammable agents - 4th degree

1.787

0.677 @25 °C

GAS

COLORLESS

-34.5 °C @ 760 MM HG

-34.5 °C @760 [mm Hg]

-136 °C

-136 °C

5430.0 [mmHg]

5990 [mm Hg] @20 °C

Propadiene, stabilized appears as a colorless flammable gas. May become unstable. Not toxic but asphyxiation may occur because of displacement of oxygen. Under prolonged exposure to fire or heat the containers may rupture violently and rocket.

Liquid

Colorless gas; [HSDB]

This chemical does not meet GHS hazard criteria for 0.3% (1 of 317) of reports.

Danger

H220 (87.7%): Extremely flammable gas [Danger Flammable gases]

P203, P210, P222, P280, P377, P381, P403, and P410+P403 (click each P-code to see the statement)

Aggregated GHS information provided per 317 reports by companies from 8 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Chemical: 1,2-Propadiene

1,2-Propadiene is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 1,2-Propadiene 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: 18-05-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/24896

1,2-propadiene: 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.)

Excerpt from ERG Guide 116 [Gases - Flammable (Unstable); polymerization hazard]:

· EXTREMELY FLAMMABLE.

Excerpt from ERG Guide 116 [Gases - Flammable (Unstable); polymerization hazard]:

· Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.

The unsaturated aliphatic hydrocarbons, such as PROPADIENE, 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. Many of these compounds undergo autoxidation upon exposure to the air to form explosive peroxides. Violent explosions have occurred at low temperatures in ammonia synthesis gas units. These explosions have been traced to the addition products of dienes and oxides of nitrogen, produced from the interaction of nitrogen oxide and oxygen [Bretherick, 1995].

/GUIDE 116P: GASES - FLAMMABLE (UNSTABLE)/ Fire or Explosion: EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. ... Those substances designated with a "P" may polymerize explosively when heated or involved in a fire. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. /Propadiene, inhibited; Propadiene, stabilized/

/GUIDE 116P: GASES - FLAMMABLE (UNSTABLE)/ Health: Vapors may cause dizziness or asphyxiation without warning. Some may be toxic if inhaled at high concentrations. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating and/or toxic gases. /Propadiene, inhibited; Propadiene, stabilized/

/GUIDE 116P: GASES - FLAMMABLE (UNSTABLE)/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. Keep unauthorized personnel away. Stay upwind. Many gases are heavier than air and will spread along ground and collect in low or confined areas (sewers, basements, tanks). Keep out of low areas. /Propadiene, inhibited; Propadiene, stabilized/

/GUIDE 116P: GASES - FLAMMABLE (UNSTABLE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing will only provide limited protection. /Propadiene, inhibited; Propadiene, stabilized/

For more DOT Emergency Guidelines (Complete) data for PROPADIENE (8 total), please visit the HSDB record page.

Propadiene, stabilized

UN2200

Div 2.1 Flammable gas (49 eCFR § 173.115)

· 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.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

Excerpt from ERG Guide 116 [Gases - Flammable (Unstable); polymerization hazard]:

General First Aid:

Excerpt from ERG Guide 116 [Gases - Flammable (Unstable); polymerization hazard]:

Immediate precautionary measure

230 [ppm]

2500 [ppm]

15000 [ppm]

Propadiene

1

10000

Flammable chemical that can be released at a facility.

Used as a chemical intermediate, a fuel gas for welding when mixed with propyne, and a monomer; [HSDB]

Gas Welding and Cutting [Category: Weld]

CHAIN-TRANSFER REAGENT IN PRODN OF POLYBUTADIENE; FUEL GAS FOR METAL-WORKING INDUSTRY (MIXT WITH PROPYNE); MONOMER FOR ALLENE POLYMERS (POSSIBLE USE)

CHEM INT IN PRODN OF ITS ISOMER, PROPYNE, METHYLENENORBORNENE, IN HYDROBORATION REACTIONS (POSSIBLE USE)

(1977) No Data

(1979) No Data

(1977) No Data

(1979) No Data

2023: 500,000 - <1,000,000 lb

(1977) MORE THAN 2.72X10+6 G-MIXT WITH PROPYNE

(1979) MORE THAN 2.72X10+6 G-MIXT WITH PROPYNE

PYROLYSIS OF PROPYLENE, ISOBUTYLENE OR A NAPHTHA/GAS OIL MIXT FOLLOWED BY SEPN, EG, BY NAPHTHA ADSORPTION; DEHYDROHALOGENATION OF PROPYLENE DIBROMIDE WITH SODIUM HYDROXIDE FOLLOWEDBY SEPN; CRACKING OF T-BUTYL ALCOHOL WITH STEAM AS A DILUENT FOLLOWED BY SEPN

A) ACTION OF ZINC DUST ON 2,3-DICHLOROPROPENE; B) PYROLYSIS OF ISOBUTYLENE; C) ELECTROLYSIS OF POTASSIUM ITACONATE.

Wholesale and Retail Trade

1,2-Propadiene: ACTIVE