7782-44-7 Oxygen

Name: Oxygen
Synonyms: Dioxygen;Molecular oxygen; Oxygen molecule
CAS Number:7782-44-7
Molecular Formula:O2
Molecular Weight:32.00
EINECS:231-956-9
Density:1.429（0℃）
Boiling Point:-183 ºC
Flash Point:none
Safety Description:Human systemic effects by inhalation: cough and other pulmonary changes. Human teratogenic effects by inhalation: developmental abnormalities of the fetal cardiovascular system. Mutation data reported. Not toxic as gas. In liquid form it can cause severe “burns” and tissue damage on contact with the skin due to extreme cold.

An oxidant. Though itself nonflammable, it is essential to combustion. Even a slight increase in the oxygen content of the air above the normal 21% greatly increases the oxidation or burning rate (and the hazard) of many materials. Exclusion of O₂ from the neighborhood of a fire is one of the principal methods of extinguishment. Avoid smoking, flames, electric sparks. Liquid O₂ can explode on contact with readily oxidizable materials, especially at high temperatures. Under the proper conditions of temperature, pressure, and reagent concentration it can react violently with acetaldehyde, acetylene, acetone, secondary alcohols (e.g., 2-propanol, 2-butanol) aluminum, Al(BH₄)₃, AlH₃, aluminum-titanium alloys, alkali metals (lithium, cesium, potassium, rubidium, sodium, potassium), ammonia, ammonia + platinum, asphalt, CCl₄, chlorinated hydrocarbons, cyanogen, barium, benzene, 1,4-benzenediol + 1-propanol, benzoic acid, Be(BH₄)₂, biological materials + ether, BAs₂Br₃, B₂H₁₀, B₂H₆, boron tribromide, boron trichloride, bromine + chlorotrifluoroethylene, butane + Ni(CO)₄, carbon disulfide, carbon disulfide + mercury + anthracene, carbon monoxide, CsH, calcium, calcium phosphide, copper + hydrogen sulfide, C₁₀H₁₄, cyclohexane-1,2-dione bis(phenylhydrazone), cyclooctatetraene, diborane, diboron tetrafluoride, dimethoxymethane, dimethylketene, dimethyl sulfide, diphenyl ethylene, disilane, ethers (e.g., diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, ethyl ether), fibrous fabrics, fluorine + hydrogen, fuels, germanium, glycerol, halocarbons (e.g., 1,1,1-trichloroethane, trichloroethylene, chlorotrifluoroethylene, bromotrifluoroethylene), hydrazine, hydrocarbons (e.g., 1,1-diphenylethylene, gasoline, cyclohexane, ethylene, cumene, p-xylene, but-3-yne), hydrocarbons + promoters (e.g., methyl nitrate, nitromethane, ethyl nitrate, tetrafluorohydrazine), hydrogen, hydrogen sulfide, lithiated dialkylnitrosoamines, magnesium, metals, metal hydrides (e.g., sodium hydride, uranium hydride, lithium hydride, potassium hydride, rubidium hydride, cesium hydride, magnesium hydride), methane, methoxycyclooctatetraene, 4-methoxytoluene, Ni(CO)₄ + butane, nonmetal hydrides (e.g., diborane, tetraborane(10), phosphine, pentaborane(11), pentaborane(9), decaborane(14), aluminum tetrahydroborate), oil films, organic matter, (OF₂ + H₂O), phosphorus, phosphorus tribromide, phosphorus trifluoride, phosphorus(III) oxide, polymers [e.g., foam rubber, neoprene, polytetrafluoroethylene (teflon)], polytetrafluoroethylene + stainless steel, polyurethane, polyvinyl chloride, propylene oxide, K₂O₂, rhenium, trirhenium nonachloride, rubber + ozone, rubberized fabric, selenium, NaH, sodium hydroxide + tetramethyldisiloxane, strontium, tetracarbonylnickel, tetracarbonylnickel + mercury, tetrafluoroethylene, tetrafluorohydrazine, tetrasilane, titanium and alloys, trisilane, CH₂Cl₂, oil, paraformaldehyde, wood, charcoal. Compressed O₂ is shipped in steel cylinders under high pressure. If these containers are broken due to shock or exposed to high temperature, an explosion and fire may result.

Analytical Methods:

   

For occupational chemical analysis use NIOSH: Oxygen (field-readable) 6601.
liansport Information:UN 1014/1