| Chemical Abstract Number (CAS #) |
76131
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| Synonyms | 1,1,2-Trichloro-1,2,2-trifluoroethane |
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Ethane, 1,1,2-trichloro-1,2,2-trifluoro- | Freon 113 |
| Molecular Formula | C2Cl3F3 |
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| Use | CHEM INT FOR POLYCHLOROTRIFLUOROETHYLENE RESINS &
POLYCHLOROTRIFLUOROETHYLENE-VINYLIDENE FLUORIDE.
FIRE EXTINGUISHERS; BLOWING AGENT; SOLVENT DRYING; DRYING
ELECTRONIC PARTS & PRECISION EQUIPMENT.
CFC-113 IS USED IN CENTRIFUGAL COMPRESSOR SYSTEMS FOR WATER OR BRINE
CHILLING.
INTERMEDIATE IN THE PRODUCTION OF CHLOROTRIFLUOROETHYLENE
MONOMER BY REACTION WITH ZINC.
It is not used in aerosol formulations as a propellant component, but is used as a solvent or active
ingredient in certain aerosol formulations.
Selective solvent in degreasing electrical equipment, photographic films, magnetic tapes,
precision instruments, plastics, glass, elastomers, or metal components. Dry cleaning solvent for
all fabrics, leather, and suede. Solvent in textile industry, and in special laboratory usage.
Refrigerant in commerical/industrial air conditioning and industrial process cooling.
Chem intermediate for dechloronization of chemicals in the manufacture of polymers and
copolymers in the production of high-temp lubricants.
Foaming or blowing agent in the manufacture of polymers for flame retardancy.
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| Consumption Patterns | MOST CFC 113 IS USED AS A SOLVENT ALTHOUGH IT ALSO HAS
REFRIGERANT APPLICATIONS (1984).
REFRIGERANTS, 39%; FOAM BLOWING AGENTS, 17%; SOLVENTS, 14%;
FLUOROPOLYMERS, 14%; STERILANT GAS, 2%; AEROSOL PROPELLANTS, 2%;
FOOD FREEZANT, 1%; OTHER, 8%; EXPORTS, 3% (1985) FLUOROCARBONS
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| Apparent Color | Colorless gas ; Volatile liquid
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| Odor | Nearly odorless ; Odor like carbon tetrachloride at high concentrations
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| Boiling Point | 47.7 DEG C @ 760 MM HG
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| Melting Point | -36.4 DEG C
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| Molecular Weight | 187.38
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| Density | 1.5635 @ 25 DEG C/4 DEG C
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| Odor Threshold Concentration | Odor detection in air: 4.5x10 1 ppm; odor recognition in air: 6.8x10 1 ppm Purities not
specified
Low: 342 mg/cu m; High: 1026 mg/cu m From table
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| Sensitivity Data | May cause irritation of eyes & throat. 1,1,2-Trichloro-1,2,2-trifluoroethane on
prolonged or repeated contact with skin may cause skin irritation.
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| Environmental Impact | Freon 113 may be released to the environment as emissions from production, storage,
transport, turbine engines, use as a foaming agent, refrigerant, and solvent, or use in the
manufacture of fluoropolymers, and it may be released to soil from the disposal of products
containing this compound (e.g. commerical industrial refrigeration units). The global release rate
of Freon 113 is estimated to be 9.1X10 4 tons per year, which corresponds with a 15% annual
increase in the abundance of Freon 113 in the atmosphere. If released to soil, Freon 113 would
rapidly volatilize from soil surfaces or leach through soil possibly into groundwater. If released to
water, essentially all Freon 113 is expected to be lost by volatilization (half-life 4 hours from a
model river). If released to the atmosphere, Freon will not degrade in the troposphere. This
compound will gradually diffuse into the stratosphere (half-life 20 years). In the stratosphere the
dominant removal mechanism is photolysis and reaction with singlet oxygen is of secondary
importance (stratospheric lifetime 63-122 years). Due to its stability, detection long distances
from its sources of emissions has occurred. General population exposure occurs by inhalation of
Freon 113 found in ambient air. Occupational exposure may occur by inhalation of contaminated
air or dermal contact.
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| Environmental Fate | Because CFC 113 has very limited solubility in water and is highly volatile, all releases of
CFC 113 can be expected to be eventually conveyed to the atmosphere.
ATMOSPHERIC: Because it is essentially inert in the troposphere, CFC 113 is transported
slowly to the stratosphere. While CFC 113 has some potential to perturb stratospheric ozone,
there is presently no evidence demonstrating that any indirect effects of CFC 113 on human health
has or is likely to occur as a result of ozone perturbation.
TERRESTRIAL FATE: If released to soil, Freon 113 would rapidly volatilize from soil surfaces
or leach through soil.
AQUATIC FATE: If released to water, essentially all Freon 113 is expected to be lost by
volatilization (half-life 4 hours from a model river). Chemical hydrolysis, bioaccumulation and
adsorption to sediments would not be significant fate processes in water.
ATMOSPHERIC FATE: If released to the atmosphere, essentially all Freon 113 is expected to
exist in the vapor phase due to its extremely high vapor pressure. The moderate water solubility of
Freon 113 suggests that some loss by wet deposition occurs, but any loss by this mechanism is
probably returned to the atmosphere by volatilization. Freon 113 will not degrade in the
troposphere, thus diffusion from the troposphere to the stratosphere would be the sole removal
mechanism (half-life 20 years ). In the stratosphere direct photolysis would be the dominant
removal mechanism and reaction with singlet oxygen would be of secondary importance. The
stratospheric lifetime of this compound ranges between 63 and 122 years. As a result of its
persistence in the atmosphere, this compound is transported long distances and its concentration
should be fairly uniform throughout the globe away from known sources.
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| Drinking Water Impact | Detected in water samples taken from the Niagara River and Cayuhoga River . Not
detected in water samples taken from Lake Ontario .
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