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Chemical Fact Sheet

Chemical Abstract Number (CAS #) 630206
CASRN 630-20-6
Synonyms1,1,1,2-Tetrachloroethane
Ethane, 1,1,1,2-tetrachloro-
Analytical Methods EPA Method 502.2
EPA Method 524.2
EPA Method 8010
EPA Method 8021
EPA Method 8260
Molecular FormulaC2H2Cl4

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

Use AS SOLVENT; MFR OF INSECTICIDES, HERBICIDES, SOIL FUMIGANTS, BLEACHES, PAINTS & VARNISHES LABORATORY REAGENT; CHEM INT FOR CHLOROCARBON SOLVENTS (NON-USA USE) 1,1,1,2-Tetrachloroethane is used as a feedstock for the production of solvents such as trichloroethylene and tetrachloroethylene
Consumption Patterns NOT USED COMMERCIALLY IN USA
Apparent Color YELLOWISH RED
Boiling Point 130.5 DEG C @ 760 MM HG
Melting Point -70.2 DEG C
Molecular Weight 167.85
Density 1.54064 @ 20 DEG C/4 DEG C
Environmental Impact It does not appear that 1,1,1,2-tetrachloroethane is presently produced in the USA or is used commercially. It may, however be formed incidentally during the manufacture of other chlorinated ethanes and released into the environment as air emissions or in wastewater. If released on land, 1,1,1,2-tetrachloroethane would be expected to leach through soil and volatilize from the soil surface. If released into water, it would be primarily lost by volatilization (estimated half-life 4.2 hr from a model river). Adsorption to sediment is expected to be relatively low and bioconcentration in aquatic organisms would not be significant. 1,1,1,2-Tetrachloroethane is extremely stable in the atmosphere, reacting with photochemically produced hydroxyl radicals with an estimated half-life of 550 days. However, it will be susceptible to washout by rain. Due to its persistence, it will disperse over long distances and slowly diffuse into the stratosphere where it would be rapidly degraded.
Environmental Fate TERRESTRIAL FATE: If released on land, 1,1,1,2-tetrachloroethane would be expected to leach into the ground and volatilize from the soil surface. AQUATIC FATE: If released into water, 1,1,1,2-tetrachloroethane would be primarily lost by volatilization (estimated half-life 4.2 hr from a model river). Adsorption to sediment is expected to relatively low. ATMOSPHERIC FATE: 1,1,1,2-Tetrachloroethane is extremely stable in the atmosphere (estimate half-life 550 days). It will be subject to washout by rain. Due to its persistence, it will disperse over long distances and slowly diffuse into the stratosphere where it would be rapidly degraded.
Drinking Water Impact DRINKING WATER: US Groundwater Supply Survey (945 supplies derived from groundwater chosen both randomly and on the basis that they may contain VOCs) - 1,1,1,2-tetrachloroethane was not detected in any supplies at a detection limit of 0.2 ppb . It was confirmed to be in extracts from the Carrollton water plant in New Orleans which derives its water from the Mississippi River . The concentration of 1,1,1,2-tetrachloroethane in a sample collected over 7 days was 0.11 ppb . EFFL: In a comprehensive survey of wastewater from 4000 industrial and publicly owned treatment works (POTWs) sponsored by the Effluent Guidelines Division of the U.S. EPA, 1,1,1,2-tetrachloroethane was identified in discharges of the following industrial category (frequency of occurrence, median concn in ppb): organics and plastics (1; 27.4), inorganic chemicals (4; 14.8), electronics (1; 272.6) . The highest effluent concn was 272.6 ppb in the electronics industry .

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