SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 79005
CASRN 79-00-5
Synonyms1,1,2-Trichloroethane
Ethane, 1,1,2-trichloro-
Analytical Methods EPA Method 502.2
EPA Method 524.2
EPA Method 601
EPA Method 624
EPA Method 8010
EPA Method 8021
EPA Method 8260
Molecular FormulaC2H3Cl3

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use Used in adhesives, production of teflon tubing, in lacquer, and coating formulations. Intermediate in the production of vinylidine chloride, as a solvent and component of adhesives. SOLVENT-EG, FOR CHLORINATED RUBBERS & POLYESTERS SOLVENT FOR FATS, OILS, WAXES, RESINS, OTHER PRODUCTS; ORGANIC SYNTHESIS.
Apparent Color Colorless liquid
Odor PLEASANT ODOR ; Sweet odor like chloroform
Boiling Point 113.8 DEG C AT 760 MM HG
Melting Point -36.5 DEG C
Molecular Weight 133.42
Density 1.4416 AT 20 DEG C/4 DEG C
Sensitivity Data Eye irritant
Environmental Impact 1,1,2-Trichloroethane will enter the atmosphere from its use in the manufacture of vinylidene chloride and its use as a solvent. It will also be discharged in wastewater associated with these uses and in leachates and volatile emissions from landfills. Releases to water will primarily be lost through evaporation. Once in the atmosphere, 1,1,2-trichloroethane will photodegrade slowly by reaction with hydroxyl radicals (half-life 24-50 days in unpolluted atmospheres to a few days in polluted atmospheres). 1,1,2-Trichloroethane has a low soil partition coefficient and as such will not partition into sediment and will readily pass through soil into the groundwater where biodegradation, if it occurs, may be very slow. Bioconcentration is not a significant process. Primary human exposure is from occupational exposure and from ambient air in the vicinity of industrial sources and contaminated drinking water.
Environmental Fate TERRESTRIAL FATE: When released to land 1,1,2-trichloroethane should partially volatilize and partially leach into the groundwater. Experimentally determined Koc values of 83-209 indicated that 1,1,2-trichloroethane will be moderately to highly mobile in soil(1,SRC). Several biodegradation screening studies have determined that 1,1,2-trichloroethane is resistant to biodegradation. Other screening studies have observed biotransformation under anaerobic conditions(2,3). Biodegradation in groundwater or subsurface regions may occur, but appears to be very slow(4,SRC). AQUATIC FATE: When released into water, 1,1,2-trichloroethane should primarily volatilize into the atmosphere(1,2). Little of the chemical will be lost by adsorption to sediment or by biodegradation. Aquatic hydroylsis and bioconcentration are not expected to be important environmentally. ATMOSPHERIC FATE: Based upon a vapor pressure of 23 mm Hg at 25 deg C , 1,1,2-trichloroethane is expected to exist almost entirely in the vapor-phase in the ambient atmosphere(2,SRC). It will degrade slowly in an average ambient atmosphere by reaction with photochemically produced hydroxyl radicals (estimated half-life of 24-50 days)(3,4,SRC). Physical removal from air via wet deposition is possible since 1,1,2-trichloroethane is relatively soluble in water.
Drinking Water Impact DRINKING WATER: Analysis of 945 finished water supplies nationwide (USEPA Groundwater Supply Survey) that use groundwater sources did not detect any 1,1,2-trichloroethane at a quantification limit of 0.5 ppb . 1,1,2-Trichloroethane has been detected in drinking water from samples of US cities(2,3,4) with 0.1-8.5 ppb being measured in the finished water from one metropolitan supply . 20 ppb reported in a contaminated New York State well(5,6); 30 Canadian Water Treatment Facilities, 2 positive, 7 ppb max in Aug/Sept; not detected in Nov/Dec(7). SURFACE WATER: 1,1.2-Trichloroethane was detected in 2.0% of 1047 USEPA STORET water stations at a median concn below 5.0 ppb . Not detected in raw water from 30 Canadian treatment facilities . Detected not qualified River Glatt, Switzerland 53 to 603 samples pos in representative New Jersey surface waters, max 18.7 ppb ; 2 tributaries on Ohio River, 3 of 7 samples pos, 0.6 ppb max, not found in 88 additional stations Ohio River mainstream 0.4% of 246 samples pos, <1.0 ppb avg(5,6). Not detected in Schuylkill River at Philadephia, PA, DL= 0.01 ppb(6). GROUND WATER: 1,1,2-Trichloroethane was detected in 2 of 13 groundwater samples (associated with leaching from waste sites) from Minnesota at levels of 7.7 and 31 ppb . Detected in 72 of 1069 samples in New Jersey, max 31.1 ppb, some of the most polluted being under urban land use areas(2,3). SEA WATER: Shorewater conc of 1,1,2-trichloroethane off Point Reyes, CA 153 parts/trillion . EFFL: Industries whose mean waste water effluent exceeds 500 ppb are auto and other laundries and paint and ink formulations, max observed effluent concn is 3 ppm (auto and other laundries) 5.4 ppm detected in industrial effluent discharge . 1,1,2-Trichloroethane was detected in 2.8% of 1345 USEPA STORET effluent stations at a median concn below 2.0 ppb . Positive identification was made for 1 of 13 effluent samples collected from a community septic tank serving 97 homes near Tacoma, WA .

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