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Chemical Hygiene Plan - Queensborough Community College ...

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• Many amines are proven or suspected human carcinogens, among aromatic<br />

amines, ortho-isomers generally exhibit stronger carcinogenic properties than<br />

those of the para- and meta-isomers.<br />

• Unlike aliphatic amines, the aromatic amines do not cause severe skin burn or<br />

corneal injury.<br />

• The pure liquids (or solids) may produce mild to moderate irritation on the skin.<br />

• Lower aromatic amines are combustible liquids and form explosive mixtures with<br />

air.<br />

• Amines may react violently with strong oxidizing compounds.<br />

Examples: Aniline<br />

Benzidine<br />

o-Toluidine<br />

AROMATIC HYDROCARBONS<br />

• Aromatics are a class of hydrocarbons having benzene-ring structures.<br />

• Many polyaromatics are carcinogens.<br />

• The acute toxicity of mononuclear aromatics is low.<br />

• Inhalation of vapors at high concentrations in air may cause narcosis with<br />

symptoms of hallucination, excitement, euphoria, distorted perception, and<br />

headache.<br />

• Benzene is the only mononuclear aromatic with possible human carcinogenicity<br />

and other severe chronic effects.<br />

• With a greater degree of substitutions in the benzene ring and/or increase in the<br />

carbon chain length of the alkyl substituents, the flammability decreases.<br />

Examples: Benzene<br />

Benzolalpyrene<br />

Pyrene<br />

Toluene<br />

Xylene<br />

AZIDES, FULMINATES, ACETYLIDES, and RELATED COMPOUNDS<br />

• These compounds form highly explosive shock- and heat-sensitive salts with<br />

many metals.<br />

• Structurally they differ from each other, but have similar detonating<br />

characteristics.<br />

• While alkali metal azides are inert to shock, the salts for copper, silver, lead, and<br />

mercury are dangerously shock sensitive.<br />

• Fulminates of heavy metals are powerful explosives.<br />

• These compounds are highly sensitive to impact and heat.<br />

• Acetylides of heavy metals are extremely shock sensitive when dry, whereas, the<br />

salts of alkali metals are fairly stable.<br />

• Most azides, fulminates, acetylides, nitrides and related compounds are highly<br />

unstable and constitute an explosion hazard.<br />

• Salts of Group IB and IIB metals are especially explosive.<br />

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