1,1,2,2-Tetrachloro-1-fluoroethane

185.828

185.84

206-546-8

5N0U1X0S7J

1078

DTXSID6059863

2903791090

0

2.89100

1.5497 g/cm³ @ Temp: 17 °C

-82.6 °C

116 °C

25.1ºC

1.457

Ozone Depleting Potential = 0.01-0.04

No rapid reaction with air. No rapid reaction with water.

Fluorinated Organic Compounds

1,1,2,2-TETRACHLORO-1-FLUOROETHANE is chemically inert in many situations, but can react violently with strong reducing agents such as the very active metals and the active metals. They suffer oxidation with strong oxidizing agents and under extremes of temperature.

1078

36/37/38

26-36/37/39

Xi: Irritant;

P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501

H315

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Some may burn but none ignite readily. Containers may explode when heated. Ruptured cylinders may rocket. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Use extinguishing agent suitable for type of surrounding fire. SMALL FIRE: Dry chemical or CO2. LARGE FIRE: Water spray, fog or regular foam. Move containers from fire area if you can do it without risk. Damaged cylinders should be handled only by specialists. FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. Some of these materials, if spilled, may evaporate leaving a flammable residue. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. LARGE SPILL: Consider initial downwind evacuation for at least 500 meters (1/3 mile). FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Do not touch or walk through spilled material. Stop leak if you can do it without risk. Do not direct water at spill or source of leak. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. If possible, turn leaking containers so that gas escapes rather than liquid. Prevent entry into waterways, sewers, basements or confined areas. Allow substance to evaporate. Ventilate the area. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing will only provide limited protection. (ERG, 2016)

No production or use information was located for 1,1,2,2-tetrachloro-1-fluoroethane(SRC). However, the HCFCs are one class of chemicals being used to replace the CFCs which are commonly used as refrigerants, solvents, and foam blowing agents(1).

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 150(SRC), determined from a structure estimation method(2), indicates that 1,1,2,2-tetrachloro-1-fluoroethane is expected to have moderate mobility in soil(SRC). Volatilization of 1,1,2,2-tetrachloro-1-fluoroethane from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.003 atm-cu m/mole(SRC), using a fragment constant estimation method(3). The potential for volatilization of 1,1,2,2-tetrachloro-1-fluoroethane from dry soil surfaces may exist(SRC) based upon an estimated vapor pressure of 19 mm Hg(SRC), determined from a fragment constant method(4). The rate of biodegradation is expected to be considerably slower than the rate of volatilization for 1,1,2,2-tetrachloro-1-fluoroethane released to soil(SRC). Highly halogenated compounds are resistant to aerobic biodegradation; under anaerobic conditions, reductive dehalogenation may occur(5).|AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 150(SRC), determined from a structure estimation method(2), indicates that 1,1,2,2-tetrachloro-1-fluoroethane is not expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.003 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 4 hours and 5.5 days, respectively(SRC). According to a classification scheme(5), an estimated BCF of 29(SRC), from an estimated log Kow of 2.8(6) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low(SRC). The rate of biodegradation is expected to be considerably slower than the rate of volatilization for 1,1,2,2-tetrachloro-1-fluoroethane released to water. Highly halogenated compounds are resistant to aerobic biodegradation; under anaerobic conditions, reductive dehalogenation may occur(8).|ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 1,1,2,2-tetrachloro-1-fluoroethane, which has an estimated vapor pressure of 19 mm Hg at 25 °C(SRC), determined from a fragment constant method(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase 1,1,2,2-tetrachloro-1-fluoroethane 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 1300 days(SRC), calculated from its rate constant of 1.2X10-14 cu cm/molecule-sec at 25 °C(SRC) determined using a structure estimation method(3). Stratospheric photolysis of 1,1,2,2-tetrachloro-1-fluoroethane frees chlorine radicals which can participate in ozone-destroying reactions(4). An ozone-depletion potential of 0.01 to 0.04 has been calculated for 1,1,2,2-tetrachloro-1-fluoroethane(5).

The rate constant for the vapor-phase reaction of 1,1,2,2-tetrachloro-1-fluoroethane with photochemically-produced hydroxyl radicals has been estimated as 1.2X10-14 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1). This corresponds to an atmospheric half-life of about 1300 days at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1). 1,1,2,2-Tetrachloro-1-fluoroethane is unreactive in neutral and alkaline solution(2) and is not expected to directly photolyze due to the lack of absorption in the environmental UV spectrum (>290 nm). However, stratospheric photolysis of ozone depleting chemicals such as 1,1,2,2-tetrachloro-1-fluoroethane frees chlorine radicals which can participate in ozone-destroying reactions(3). The ozone-depletion potential for 1,1,2,2-tetrachloro-1-fluoroethane is 0.01 to 0.04(4).

An estimated BCF of 29 was calculated for 1,1,2,2-tetrachloro-1-fluoroethane(SRC), using an estimated log Kow of 2.8(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC).

Using a structure estimation method based on molecular connectivity indices(1), the Koc for 1,1,2,2-tetrachloro-1-fluoroethane can be estimated to be 150(SRC). According to a classification scheme(2), this estimated Koc value suggests that 1,1,2,2-tetrachloro-1-fluoroethane is expected to have moderate mobility in soil.

The Henry's Law constant for 1,1,2,2-tetrachloro-1-fluoroethane is estimated as 0.003 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that 1,1,2,2-tetrachloro-1-fluoroethane is expected to volatilize from water surfaces(2). Based on this estimated 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 4 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 5.5 days(SRC). 1,1,2,2-Tetrachloro-1-fluoroethane's estimated Henry's Law constant(1) indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of 1,1,2,2-tetrachloro-1-fluoroethane from dry soil surfaces may exist(SRC) based upon an estimated vapor pressure of 19 mm Hg(SRC), determined from a fragment constant method(3).

Occupational exposure to 1,1,2,2-tetrachloro-1-fluoroethane may occur through inhalation and dermal contact with this compound at workplaces where 1,1,2,2-tetrachloro-1-fluoroethane is produced or used. (SRC)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Vapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating, corrosive and/or toxic gases. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water. Keep victim calm and warm. (ERG, 2016)

Ethane, 1,1,2,2-tetrachloro-1-fluoro-: INACTIVE|Class II substances are listed in section 602 of the Clean Air Act, and comprise all HCFCs. All the class II substances and their isomers are regulated under the accelerated phaseout. ... No production and no importing of any HCFSs /by/ 2030.