Ethylene oxide is a colorless gas at room temperature and a colorless liquid below 51ºF (10.7ºC). It is shipped as a liquefied, compressed gas. Both the gas and liquid are potential fire and explosion hazards.
At room temperature, anhydrous ammonia is a colorless, highly irritating gas with a pungent, suffocating odor. It is lighter than air and flammable, with difficulty, at high concentrations and temperatures. It is easily compressed and forms a clear, colorless liquid under pressure.
Phosgene is a colorless, fuming liquid below 47ºF (8.2ºC) and a colorless, nonflammable gas above 47ºF. At low concentrations, its odor is similar to that of green corn or new mown hay; at high concentrations, its odor can be sharp and suffocating.
At temperatures below 78ºF, hydrogen cyanide is a colorless or pale-blue liquid (hydrocyanic acid); at higher temperatures, it is a colorless gas. Hydrogen cyanide is very volatile, producing potentially lethal concentrations at room temperature.
Acrolein is a clear, colorless, or yellow liquid with a pungent, suffocating odor. It is very flammable and may polymerize violently.
At room temperature, acrylonitrile is a clear, colorless, or slightly yellow liquid. It is very volatile, producing flammable and toxic air concentrations at room temperature and may explode.
At room temperature, methylene chloride is a clear, colorless liquid with a pleasant odor. It is volatile, producing potentially toxic concentrations at room temperature.
Lewisite is an organic arsenical known for its vesicant properties. Pure Lewisite is an oily, colorless liquid, while impure Lewisite is amber to black.
At room temperature, tetrachloroethylene is a colorless, nonviscous, nonflammable liquid. It evaporates easily and has a sweet odor. The vapors are heavier than air.
At room temperature, trichloroethylene is a clear, colorless liquid with a sweet, chloroform-like odor. It is volatile, producing potentially toxic concentrations at room temperature.
At temperatures below 39ºC (102ºF), methyl isocyanate is a very flammable liquid that readily evaporates when exposed to air. Gaseous methyl isocyanate is approximately 1.4 times heavier than air. Methyl isocyanate liquid is colorless with a pungent odor.
At room temperature, carbon disulfide is a very flammable liquid that readily evaporates when exposed to air. Gaseous carbon disulfide is more than twice as heavy as air. Pure carbon disulfide liquid is colorless with a pleasant odor.
Nitrogen mustards are vesicants and alkylating agents. They are colorless to pale yellow, oily liquids that evaporate slowly. HN-1 has a faint, fishy or musty odor.
Pure hydrogen peroxide is a crystalline solid below 12ºF and a colorless liquid with a bitter taste above 12ºF. Hydrogen peroxide is unstable, decomposing readily to oxygen and water with release of heat.
Crotonaldehyde exists in two isomeric forms (cis and trans) that have similar properties and effects. At room temperature, the mixture is a clear, colorless liquid that turns yellow upon contact with air or exposure to light. It has a pungent, suffocating odor.
Methyl bromide is a colorless gas at room temperature and a liquid below 38.5ºF (3.6ºC) or when compressed. It is odorless and nonirritating at low concentrations and has a musty or fruity odor at high concentrations.
At room temperature, benzene is a clear, colorless-to-light yellow liquid that is highly flammable. Because it is volatile, it can spread to a distant source of ignition. Benzene has a sweet aromatic odor.
Ethylene dibromide is a nonflammable colorless liquid with a sweet chloroform-like odor at room temperature above 50ºF (10ºC). It is slightly soluble in water and soluble in most organic solvents. It is heavier than water.
Toluene is a clear, colorless, volatile liquid with a sweet, pungent, benzene-like odor. It is flammable at temperatures greater than 40ºF (4.4ºC); therefore, it is a significant fire hazard at room temperature.
1,1,1-Trichloroethane is a colorless, nonflammable liquid. It evaporates quickly and has a sweet, chloroform-like odor. It can explode if concentrations of 7.5% to 15.5% in air are ignited by a spark or flame.
The Tetramethoxysilane (SiC4H12O4) is a flammable, colorless liquid, that is toxic by ingestion and inhalation; irritating to skin and eyes. Because it is flammable, we recommend a safe chemical storage building that meets specific regulations for storing Tetramethoxysilane.