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3 - Flammable liquid
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The Chemical Identifier fields include common identification numbers, the NFPA diamond U.S. Department of Transportation hazard labels, and a general description of the chemical. The information in CAMEO Chemicals comes from a variety of data sources.
CAS Number UN/NA Number
DOT Hazard Label USCG CHRIS Code
  • Flammable Liquid
NIOSH Pocket Guide International Chem Safety Card
1,2-Dichloroethyleneexternal link none
NFPA 704
Diamond Hazard Value Description
1 2
Blue Health 1 Can cause significant irritation.
Red Flammability 3 Can be ignited under almost all ambient temperature conditions.
Yellow Instability 2 Readily undergoes violent chemical changes at elevated temperatures and pressures.
White Special
Note: NFPA ratings shown are for 1,2-dichloroethylene (mixed isomers), CAS number 540-59-0.
(NFPA, 2010)
General Description
Clear colorless liquid with a pleasant odor. Flash point 43°F.

The Hazard fields include special hazard alerts air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents. The information in CAMEO Chemicals comes from a variety of data sources.
Reactivity Alerts
  • Highly Flammable
  • Polymerizable
Air & Water Reactions
Highly flammable. Oxidizes in air to form unstable peroxides that may explode spontaneously. Insoluble in water.
Fire Hazard
This compound is flammable. (NTP, 1992)
Health Hazard
SYMPTOMS: Symptoms of exposure to this compound may include irritation of the skin and eyes, mucous membranes and upper respiratory tract. It may also cause dizziness, nausea, frequent vomiting, central nervous system intoxication and transient renal effects. Other symptoms include sleep disturbances and hallucinations. It can cause weakness, tremor, cramps and dermatitis. It may also cause drowsiness and unconsciousness. Other symptoms include conjunctivitis and narcosis.

ACUTE/CHRONIC HAZARDS: The vapor of this compound is heavier than air and may travel to a source of ignition and flash back. This chemical can cause skin and eye irritation. When heated to decomposition it emits toxic fumes of hydrogen chloride gas, carbon monoxide, carbon dioxide and phosgene. It is moderately toxic by ingestion, inhalation and skin contact. High concentrations may be narcotic. (NTP, 1992)
Reactivity Profile
1,2-DICHLOROETHYLENE reacts with alkalis, difluoromethylene, dihypofluorite, and nitrogen tetraoxide. Contact with solid alkalis or their concentrated solutions will cause formation of chloroacetylene, which ignites in air. Avoid contact with copper and copper alloys. Corrosive to metals unless an inhibitor has been added. Oxidation in the presence of concentrated sulfuric acid or a free radical initiator gives chloroacetyl chloride via epoxide intermediates. Incompatible with organic peroxides (NTP, 1992).
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

Use caution: Liquids with this reactive group classification have been known to react with the absorbent listed below. More info about absorbents, including situations to watch out for...

  • Dirt/Earth

The Response Recommendation fields include isolation and evacuation distances, as well as recommendations for firefighting, non-fire response, protective clothing, and first aid. The information in CAMEO Chemicals comes from a variety of data sources.
Isolation and Evacuation
Excerpt from ERG Guide 130(P) [Flammable Liquids (Water-Immiscible / Noxious); polymerization hazard]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 50 meters (150 feet) in all directions.

LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).

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)
Fires involving this material should be controlled using a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used. (NTP, 1992)
Non-Fire Response
SMALL SPILLS AND LEAKAGE: If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

STORAGE PRECAUTIONS: You should protect this chemical from exposure to light. Keep the container tightly closed under an inert atmosphere, and store it in an explosion-proof refrigerator. STORE AWAY FROM SOURCES OF IGNITION. (NTP, 1992)
Protective Clothing
RECOMMENDED RESPIRATOR: When working with this chemical, wear a NIOSH-approved full face chemical cartridge respirator equipped with the appropriate organic vapor cartridges. If that is not available, a half face respirator similarly equipped plus airtight goggles can be substituted. However, please note that half face respirators provide a substantially lower level of protection than do full face respirators.

RECOMMENDED GLOVE MATERIALS: If this chemical makes direct contact with your gloves, or if a tear, puncture or hole develops, replace them at once.

Glove Type Model Number Thickness Bkthru Time
PVA Edmont 25-545 0.81 mm 120 min (NTP, 1992)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.

INGESTION: DO NOT INDUCE VOMITING. Volatile chemicals have a high risk of being aspirated into the victim's lungs during vomiting which increases the medical problems. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

The Physical Property fields include properties such as vapor pressure and boiling point, as well as explosive limits and toxic exposure thresholds The information in CAMEO Chemicals comes from a variety of data sources.
Chemical Formula:
  • C2H2Cl2
Flash Point: 43°F (NTP, 1992)
Lower Explosive Limit (LEL): 9.7 % (NTP, 1992)
Upper Explosive Limit (UEL): 12.8 % (NTP, 1992)
Autoignition Temperature: 860°F (NTP, 1992)
Melting Point: -58°F (NTP, 1992)
Vapor Pressure: 200 mmHg at 57°F ; 400 mmHg at 87.4°F (NTP, 1992)
Vapor Density (Relative to Air): 3.34 (NTP, 1992)
Specific Gravity: 1.2743 at 77°F (NTP, 1992)
Boiling Point: 117°F at 745 mmHg (NTP, 1992)
Molecular Weight: 96.95 (NTP, 1992)
Water Solubility: less than 1 mg/mL at 64°F (NTP, 1992)
Ionization Energy/Potential: 9.65 eV [From NPG: 1,2-Dichloroethylene] (NIOSH, 2022)
IDLH: 1000 ppm [From NPG: 1,2-Dichloroethylene] (NIOSH, 2022)

AEGLs (Acute Exposure Guideline Levels)

Final AEGLs for trans-1,2-Dichloroethylene (156-60-5)
Exposure Period AEGL-1 AEGL-2 AEGL-3
10 minutes 280 ppm 1000 ppm 1700 ppm
30 minutes 280 ppm 1000 ppm 1700 ppm
60 minutes 280 ppm 1000 ppm 1700 ppm
4 hours 280 ppm 690 ppm 1200 ppm
8 hours 280 ppm 450 ppm 620 ppm
(NAC/NRC, 2022)

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Dichloroethylene, trans-1,2- (156-60-5) 280 ppm 1000 ppm 1700 ppm LEL = 56000 ppm
(DOE, 2018)

The Regulatory Information fields include information from the U.S. Environmental Protection Agency's Title III Consolidated List of Lists, the U.S. Cybersecurity and Infrastructure Security Agency's Chemical Facility Anti-Terrorism Standards, and the U.S. Occupational Safety and Health Administration's Process Safety Management of Highly Hazardous Chemicals Standard List (see more about these data sources).

EPA Consolidated List of Lists

Regulatory Name CAS Number/
313 Category Code
CAA 112(r)
1,2-Dichloroethylene 156-60-5 1000 pounds U079

(EPA List of Lists, 2022)

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

This section provides a listing of alternate names for this chemical, including trade names and synonyms.
  • ETHENE, 1,2-DICHLORO-, (E)-
  • HCC 1130T
  • NCI-C54591
  • R 1130T

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