| Chemical Abstract Number (CAS #) |
630206
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| Synonyms | 1,1,1,2-Tetrachloroethane |
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Ethane, 1,1,1,2-tetrachloro- |
| Analytical Methods |
EPA Method 502.2 |
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EPA Method 524.1 |
EPA Method 524.2 |
EPA Method 8010B |
EPA Method 8021A |
EPA Method 8240B |
EPA Method 8260A |
| Molecular Formula | C2H2Cl4 |
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| 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
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| Consumption Patterns | NOT USED COMMERCIALLY IN USA
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| Apparent Color | YELLOWISH RED
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| Boiling Point | 130.5 DEG C @ 760 MM HG
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| Melting Point | -70.2 DEG C
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| Molecular Weight | 167.85
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| Density | 1.54064 @ 20 DEG C/4 DEG C
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| 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.
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| 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.
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| 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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