pyrocatechol

py·ro·cat·e·chol

P5748450 (pī′rō-kăt′ĭ-kôl′, -kŏl′, -kōl′)n. A biologically important phenol, C₆H₆O₂, having two hydroxyl groups attached to the benzene ring, used in dyeing, tanning, photography, and as an antiseptic. Also called catechol.

pyrocatechol

(ˌpaɪrəʊˈkætɪˌtʃɒl; -kɒl) or

pyrocatechin

n (Elements & Compounds) another name for catechol

cat•e•chol

(ˈkæt ɪˌkɔl, -ˌkɒl)

n. a colorless, crystalline derivative of benzene, C₆H₆O₂, used chiefly in photography, for dyeing, and as a reagent. Also called pyrocatechol. [1875–80; catech (u) + -ol¹]

Pyrocatechol

(o-dihydroxybenzene), a dihydric phenol; a colorless crystalline solid with a phenol odor. Melting point, 104°C; boiling point, 246°C. Darkens rapidly upon exposure to air; soluble in water, alcohol, and ether.

Pyrocatechol fuses with phthalic anhydride to yield the dyes alizarin and hystazarin. It is alkylated by isobutylene to tert-butylpyrocatechol, an effective inhibitor of free radical processes. Pyrocatechol is used as a photographic developer.

Pyrocatechol is found in the molecules of many native aromatic compounds (for example, tannins), from which it was first obtained by dry distillation. It is a source material in the preparation of adrenalin; the monomethyl ether of pyrocatechol is called guaiacol. Pyrocatechol is commercially prepared by alkaline fusion of o-chlorophenol or o-phenolsulfonic acid.

单词	pyrocatechol
释义	pyrocatechol py·ro·cat·e·chol P5748450 (pī′rō-kăt′ĭ-kôl′, -kŏl′, -kōl′)n. A biologically important phenol, C₆H₆O₂, having two hydroxyl groups attached to the benzene ring, used in dyeing, tanning, photography, and as an antiseptic. Also called catechol. pyrocatechol (ˌpaɪrəʊˈkætɪˌtʃɒl; -kɒl) or pyrocatechin n (Elements & Compounds) another name for catechol cat•e•chol (ˈkæt ɪˌkɔl, -ˌkɒl) n. a colorless, crystalline derivative of benzene, C₆H₆O₂, used chiefly in photography, for dyeing, and as a reagent. Also called pyrocatechol. [1875–80; catech (u) + -ol¹] Pyrocatechol Pyrocatechol (o-dihydroxybenzene), a dihydric phenol; a colorless crystalline solid with a phenol odor. Melting point, 104°C; boiling point, 246°C. Darkens rapidly upon exposure to air; soluble in water, alcohol, and ether. Pyrocatechol fuses with phthalic anhydride to yield the dyes alizarin and hystazarin. It is alkylated by isobutylene to tert-butylpyrocatechol, an effective inhibitor of free radical processes. Pyrocatechol is used as a photographic developer. Pyrocatechol is found in the molecules of many native aromatic compounds (for example, tannins), from which it was first obtained by dry distillation. It is a source material in the preparation of adrenalin; the monomethyl ether of pyrocatechol is called guaiacol. Pyrocatechol is commercially prepared by alkaline fusion of o-chlorophenol or o-phenolsulfonic acid. pyrocatechol py·ro·cat·e·chol (pī'rō-kat'ĕ-kol), A constituent of the catecholamines, epinephrine and norepinephrine, and dopa; used externally as an antiseptic. Synonym(s): catechol (1) , pyrocatechin
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