- Carbon oxide
- Carbonic oxide
- Carbon monoxide, compressed gas
A colorless odorless gas.
Reducing agent in metallurgical operations, fischer-tropsch processes for petroleum-type products, manufacture of metal carbonyls.
Registry Numbers and Inventories.
EC Index Number
Extremely flammable; Toxic for reproduction Category 1; Toxic
Mutagen; Reproductive Effector; Human Data
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
49 (-209 C)
Odor Threshold Odor threshold Odorless
0.791 g/cm3 (20 C)
Solubility in water
9.8 g/s2 (liquid at 80 K)
Heat of fusion
Heat of vaporization
Heat of combustion
Hazards and Protection.
Store in a cool, dry, well-ventilated location. Separate from alkali metals. Remove the sources of ignition. Electric installation should be explosion-proof construction. Protect container against sunlight, and store in well-ventilated, safe areas.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles -- as recommended by the manufacturer. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Avoid any direct contact with the liquid.
Stable - severe hazard when exposed to heat or flame.
Reacts explosively with bromine trifluoride at high temperatures or concentrations Reacts with lithium to give lithium carbonyl, which detonates violently with water, igniting the gaseous products.
Upper exp. limit, %
Lower exp. limit, %
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Extremely - combustion imminent. Very flammable.
EXTREMELY FLAMMABLE. May be ignited by heat, sparks or flames. Flame may be invisible. Containers may explode when heated. Vapor explosion and poison hazard indoors, outdoors or in sewers. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Runoff may create fire or explosion hazard.
Asphyxiation due to carbon dioxide production may result.
OSHA PEL: TWA 50 ppm (55 mg/m3) NIOSH REL: TWA 35 ppm (40 mg/m3) C 200 ppm (229 mg/m3) NIOSH IDLH: 1200 ppm
Acute effects include headache, syncope, seizures, dizziness, confusion and coma. Delayed effects may occur days to weeks after exposure; advanced age and neurologic anomalies during the acute event appear to be risk factors. 1. Severe effects may include mental deterioration, disorientation, hypokinesia, mutism, confusion, severe memory loss, coma, gait disturbances, incontinence, speech disturbance, tremor, visual loss, movement disorders, and parkinsonian syndrome. 2. Subtle effects may include headache, anorexia, nausea, apathy, lethargy, forgetfulness, personality changes, memory problems, irritability and dizziness. CO exposure during pregnancy is teratogenic, depending upon the stage of pregnancy. The fetus is more vulnerable to CO poisoning than the mother.
Nausea and vomiting are common; may mimic acute gastroenteritis or food poisoning.
Tachypnea is common. Respiratory failure, dyspnea, or pulmonary edema may occur.
Bullous lesions associated with carbon monoxide poisoning generally appear within 24 hours of exposure and are usually located on the palms and soles.
Visual field deficits, retinopathy, or retrobulbar neuritis are late findings.
Seek medical assistance.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water.
Immediately flush with running water for at least 20 minutes.
USCG CHRIS Code
Std. Transport #