Gases contaminant, classification

ACGIH TLV TWA 2 mg(Al)/m3 DOT CLASSIFICATION 4.3 Label Dangerous When Wet SAFETY PROFILE Hydrides of some metals (such as ASH3) are extremely toxic. Dangerous fire hazard. An unstable material which is spontaneously flammable in air or O2. Evolves explosive H2 upon contact with moisture. Severe explosion hazard by chemical reacdon wherein H2 gas is produced, also in contact with methyl ethers contaminated by CO2. Mixtures with tetrazole derivadves are explosive. Reacts with oxidizing materials. On contact with acid or acid fumes, it can emit toxic fumes. See also HYDRIDES and ALUMINUM COMPOUNDS. 

DOT CLASSIFICATION 8 Label Corrosive (UN 1789) DOT Class 2.3 Label Poison Gas, Corrosive (UN 1050, UN 2186) SAFETY PROFILE A human poison by an unspecified route. Mildly toxic to humans by inhaladon. Moderately toxic experimentally by ingestion. A corrosive irritant to the skin, eyes, and mucous membranes. Mutation data reported. An experimental teratogen. A concentration of 35 ppm causes irritation of the throat after short exposure. In general, hydrochloric acid causes little trouble in industry other than from accidental splashes and burns. It is a common air contaminant and is heavily used in industry. 

DOT CLASSIFICATION 2.3 Label Poison Gas, Flammable Gas SAFETY PROFILE Poison by inhalation. Mutation data reported. A common air contaminant. Very dangerous fire hazard when exposed to heat or flame can react vigorously with oxidizing materials. 

Airborne contaminants can be present as liquids or solids, as gaseous material in the form of a true gas or vapor, or in combinations of both gaseous and particulate matter. Most often, airborne contaminants are classified according to physical state and physiological effect on the human body. Knowledge of these classifications is necessary for proper evaluation of the work environment. One must also consider the route of entry and action of the contaminant. 

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