| benzene r. |
the closed hexagon of carbon atoms in benzene (C6H6), from which the different benzene compounds are derived by replacement of the hydrogen atoms.
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| benzenemethanol |
benzyl alcohol.
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| benzhexol hydrochloride |
BAN for trihexyphenidyl hydrochloride.
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| benzidine |
a colorless, crystalline arylamine compound formed by the action of acids on hydrazobenzene; once widely used in testing for occult blood, its use is now limited because it is a carcinogen and is toxic if absorbed through the skin, ingested, or inhaled. Called also p-diaminodiphenyl.
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| benzidine t. |
(for occult blood in urine or feces): benzidine, acetic acid, and hydrogen peroxide are added to the specimen; hemoglobin catalyzes the oxidation of benzidine by hydrogen peroxide, giving a blue color. This is the most sensitive screening test for occult blood, but it is seldom used because benzidine is a carcinogen, and its use is restricted.
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