1-Heptene

· 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.

Remove from exposure. Administer artificial respiration if needed. (USCG, 1999)

General First Aid:

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

150 [ppm]

500 [ppm]

5000 [ppm]

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 3,500(SRC), determined from a log Kow of 3.99(2) and a regression-derived equation(3), indicates that 1-heptene is expected to have slight mobility in soil(SRC). Volatilization of 1-heptene from moist soil surfaces is expected to be an important fate process(SRC) given a Henry's Law constant of 0.421 atm-cu m/mole(SRC) determined from a vapor pressure of 59.3 mm Hg(4) and water solubility of 18.2 mg/l at 25 °C(5). The potential for volatilization of 1-heptene from dry soil surfaces may exist(SRC) based upon this compounds vapor pressure(4). 1-Heptene's linear hydrocarbon structure would suggest that biodegradation is an important process in soil(6).

AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 3,500(SRC), determined from a log Kow of 3.99(2) and a regression-derived equation(3), indicates that 1-heptene is expected to adsorb to suspended solids and sediment in water(SRC). Volatilization from water surfaces is expected to occur rapidly(3) based upon the Henry's Law constant of 0.421 atm-cu m/mole(SRC) determined from a vapor pressure of 59.3 mm Hg(4) and water solubility of 18.2 mg/l at 25 °C(5). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 3 and 94 hours, respectively(SRC). According to a classification scheme(6), an estimated BCF of 630(SRC), from its log Kow(2) and a regression-derived equation(3), suggests the potential for bioconcentration in aquatic organisms is high(SRC). 1-Heptene's linear hydrocarbon structure would suggest that biodegradation is an important process in water(7).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 1-heptene, which has a vapor pressure of 59.3 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase 1-heptene is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be 9.5 hours(SRC), calculated from its rate constant of 4.05X10-11 cu cm/molecule-sec at 25 °C(3). The rate constant for the gas-phase reaction of 1-heptene with ozone has been measured as 1.7X10-17 cu cm/molecule-sec at 25 °C(4). This corresponds to an atmospheric half-life of about 16 hours at an atmospheric concentration of 7X10+11 ozone molecules per cu cm(4).

Neurotoxin - Acute solvent syndrome

Neurotoxin - Acute solvent syndrome

1-Heptene was detected in the effluent of turbo jet engines operated under varying operating conditions at concns of 0-7.3 ppb(1). 1-Heptene was identified, not quantified, in the volatiles of combusted plastics used primarily for agricultural applications(2). 1-Heptene was identified in 8 of 25 air samples taken from a landfill in Staten Island, NY at a mean concn of 0.20 ppm and a max concn of 1.31 ppm(3).

The Koc of 1-heptene is estimated as 3,500(SRC), using a log Kow of 3.99(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that 1-heptene is expected to have slight mobility in soil(SRC).

SOURCE DOMINATED: 1-Heptene was identified, not quantified, in the Allegheny Tunnel, PA in 1979(1). 1-Heptene was detected at a concn of 0.2 mg/cu m in the vicinity of a gasoline station(2).

URBAN/SUBURBAN: 1-Heptene was identified, not quantified, in Leningrad, Russia, Zurich, Switzerland and Houston, TX(1).

RURAL/REMOTE: 1-Heptene was identified, not quantified, in the Sierra Nevada Mountains(1).

THE MICROBIAL OXIDATION OF HYDROCARBONS WAS MEASURED BY OXYGRAPHY. PENTANE TO N-OCTANE OXIDIZED WITH INCR IN SPECIFIC ACTIVITY, FOLLOWED BY DECR AS HYDROCARBON CHAIN INCR TO HEPTADECANE. N-ALKENES OXIDIZE @ LOWER RATES THAN N-ALKANES.

Pure cultures isolated from soil and water samples of Yellowstone National Park were unable to utilize 1-heptene as a sole carbon and energy growth source(1). Corynebacterium sp was unable to utilize 1-heptene as a sole carbon and energy growth source(2). However, 1-heptene's linear hydrocarbon structure would suggest that biodegradation is an important process in soil and water(3).

An estimated BCF of 630 was calculated for 1-heptene(SRC), using a log Kow of 3.99(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is high(SRC).

The Henry's Law constant for 1-heptene is estimated as 0.421 atm-cu m/mole(SRC) from its vapor pressure of 59.3 mm Hg(1) and water solubility of 18.2 mg/l at 25 °C(2). This Henry's Law constant indicates that 1-heptene is expected to volatilize rapidly from water surfaces(3). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 3 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 94 hours(SRC). 1-Heptene's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of 1-heptene from dry soil surfaces may exist(SRC) based upon the vapor pressure of this compound(1).

HEPATIC MICROSOMAL CYTOCHROME P-450 FROM PHENOBARBITAL-PRETREATED RATS IS DESTROYED IN VITRO, IN PRESENCE OF NADPH BY 1-HEPTENE. HEPATIC GREEN PIGMENTS FORMED ON ADMIN OF TERMINAL OLEFINS.

STUDY ON MUTAGENIC ACTIVITY OF 1-HEPTENE, USING AMES TEST WITH TA100 STRAIN OF S TYPHIMURIUM, 1-HEPTENE WAS INACTIVE AS A MUTAGEN.

THE HARMFUL EFFECTS OF WATER POLLUTANTS ON PROTOZOA WAS DETERMINED. A STUDY LISTING VARIOUS TOXICITY THRESHOLDS TO URONEMA PARDUCZI REVEALED 1-HEPTENE TO BE LESS THAN 10 MG/L.

The rate constant for the vapor-phase reaction of 1-heptene with photochemically-produced hydroxyl radicals has been measured as 4.05X10-11 cu cm/molecule-sec at 25 °C(1). This corresponds to an atmospheric half-life of about 9.5 hours at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1). The rate constant for the vapor-phase reaction of 1-heptene with ozone has been measured as 1.7X10-17 cu cm/molecule-sec at 25 °C(2). This corresponds to an atmospheric half-life of about 16 hours at an atmospheric concentration of 7X10+11 ozone molecules per cu cm(2). 1-Heptene is not expected to undergo hydrolysis in the environment due to the lack of hydrolyzable functional groups(3).