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Chemical Datasheet

1,1,2,2-TETRACHLORO-1,2-DIFLUOROETHANE

2.2 - Non-flammable, non-poisonous gas

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 76-12-0   (1,1,2,2-TETRACHLORO-1,2-DIFLUOROETHANE)
  • 1078
  • Non-Flammable Gas
none
NIOSH Pocket Guide International Chem Safety Card
1,1,2,2-Tetrachloro-1,2-difluoroethane
  • 1,1,2,2-TETRACHLORO-1,2-DIFLUOROETHANE
NFPA 704
data unavailable
General Description
Colorless low-melting solid or liquid with a slight ethereal odor. Mp: 26.5°C; bp: 92.5°C. Density (of liquid): 1.64 g cm-3 at 30°C. Used as a refrigerant, a solvent extractant, and in dry cleaning.

Hazards

Reactivity Alerts
none
Air & Water Reactions
No rapid reaction with air. No rapid reaction with water.
Fire Hazard
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. CAUTION: Aerosols (UN1950) may contain a flammable propellant. (ERG, 2020)
Health Hazard
Excerpt from NIOSH Pocket Guide for 1,1,2,2-Tetrachloro-1,2-difluoroethane:

Exposure Routes: Inhalation, ingestion, skin and/or eye contact

Symptoms: In Animals: irritation eyes, skin; conjunctivitis; pulmonary edema; narcosis

Target Organs: Eyes, skin, respiratory system, central nervous system (NIOSH, 2022)
Reactivity Profile
1,1,2,2-tetrachloro-1,2-Difluoroethane is non-flammable. Incompatible with active metals such as potassium, sodium, beryllium, powdered aluminum, zinc, magnesium, and calcium. Reacts with acids.
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation
Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]:

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, 2020)
Firefighting
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. If it can be done safely, move undamaged containers away from the area around the fire. Damaged cylinders should be handled only by specialists.

FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned master stream devices 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, 2020)
Non-Fire Response
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, 2020)
Protective Clothing
Excerpt from NIOSH Pocket Guide for 1,1,2,2-Tetrachloro-1,2-difluoroethane:

Skin: PREVENT SKIN CONTACT - Wear appropriate personal protective clothing to prevent skin contact.

Eyes: PREVENT EYE CONTACT - Wear appropriate eye protection to prevent eye contact.

Wash skin: WHEN CONTAMINATED - The worker should immediately wash the skin when it becomes contaminated.

Remove: WHEN WET OR CONTAMINATED - Work clothing that becomes wet or significantly contaminated should be removed and replaced.

Change: No recommendation is made specifying the need for the worker to change clothing after the workshift. (NIOSH, 2022)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Excerpt from NIOSH Pocket Guide for 1,1,2,2-Tetrachloro-1,2-difluoroethane:

Eye: IRRIGATE IMMEDIATELY - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.

Skin: SOAP WASH PROMPTLY - If this chemical contacts the skin, promptly wash the contaminated skin with soap and water. If this chemical penetrates the clothing, promptly remove the clothing and wash the skin with soap and water. Get medical attention promptly.

Breathing: RESPIRATORY SUPPORT - If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the affected person warm and at rest. Get medical attention as soon as possible.

Swallow: MEDICAL ATTENTION IMMEDIATELY - If this chemical has been swallowed, get medical attention immediately. (NIOSH, 2022)

Physical Properties

Chemical Formula:
  • CCl2FCCl2F
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 77°F (NIOSH, 2022)
Vapor Pressure: 40 mmHg (NIOSH, 2022)
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 1.65 (NIOSH, 2022)
Boiling Point: 199°F at 760 mmHg (NIOSH, 2022)
Molecular Weight: 203.8 (NIOSH, 2022)
Water Solubility: 0.01 % at 77°F (NIOSH, 2022)
Ionization Energy/Potential: 11.30 eV (NIOSH, 2022)
IDLH: 2000 ppm (NIOSH, 2022)

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Tetrachloro-1,2-difluoroethane, 1,1,2,2- (76-12-0) 150 ppm 1600 ppm 15000 ppm
(DOE, 2018)

Regulatory Information

EPA Consolidated List of Lists

No regulatory information available.

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names