Formaldehyde

Formaldehyde
: A pungent gas, with the chemical formula HCHO, used as an antiseptic, disinfectant, and especially today as a fixative for histology (the study of tissues under the microscope). Formalin is a 37% aqueous (water) solution of formaldehyde.
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A pungent gas, HCHO; used as an antiseptic, disinfectant, and histologic fixative. SYN: formic aldehyde, methyl aldehyde. [form(ic) + aldehyde]
- active f. 1. a hydroxymethyl derivative of tetrahydrofolate or thiamin pyrophosphate; 2. N5,N10-methylenetetrahydrofolate.

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form·al·de·hyde fȯr-'mal-də-.hīd, fər- n a colorless pungent irritating gas CH2O used chiefly as a disinfectant and preservative and in chemical synthesis

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n.
the aldehyde derivative of formic acid, formerly used as a vapour to sterilize and disinfect rooms and such items as mattresses and blankets. The toxic vapour is produced by boiling formalin in an open container or using it in a sealed autoclave.

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for·mal·de·hyde (for-malґdə-hīd) a gas formerly used as a strong disinfectant; an aqueous solution called formaldehyde solution (see under solution) is used as a disinfectant and as a preservative and fixative for pathologic specimens. The gas is toxic if inhaled or absorbed through the skin and is carcinogenic. Called also methanal and formic aldehyde.

Medical dictionary. 2011.

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  • formaldéhyde — [ fɔrmaldeid ] n. m. • 1893; de form(ique) et aldéhyde ♦ Chim. Aldéhyde formique, gaz incolore et irritant (HCHO), utilisé en solution comme désinfectant (⇒ formol) et dans la synthèse organique. ● formaldéhyde nom masculin Aldéhyde CH2≅O. ●… …   Encyclopédie Universelle

  • Formaldehyde — For*mal de*hyde, n. [Formic + aldehyde.] (Chem.) A colorless, volatile liquid, {H2CO}, resembling acetic or ethyl aldehyde, and chemically intermediate between methyl alcohol and formic acid. [1913 Webster] …   The Collaborative International Dictionary of English

  • formaldehyde — formaldehyde. См. формальдегид. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • formaldehyde — pungent gas formed by oxidation of methyl alcohol, 1869, a contraction of formic aldehyde; see FORMIC (Cf. formic) + ALDEHYDE (Cf. aldehyde). Discovered in 1863 by German chemist August Wilhelm von Hofmann (1818 1892) …   Etymology dictionary

  • formaldehyde — ► NOUN Chemistry ▪ a colourless pungent gas derived from methanol, used in solution as a preservative for biological specimens. ORIGIN blend of FORMIC ACID(Cf. ↑formic acid) and ALDEHYDE(Cf. ↑aldehyde) …   English terms dictionary

  • formaldehyde — [fôr mal′də hīd΄, fərmal′də hīd΄] n. [ FORM(IC) + ALDEHYDE] a pungent gas, HCHO, used in solution as a strong disinfectant and preservative, and in the manufacture of synthetic resins, dyes, etc …   English World dictionary

  • Formaldehyde — For other uses, see Formaldehyde (disambiguation). Formaldehyde …   Wikipedia

  • Formaldehyde — Méthanal Méthanal Représentation du méthanal …   Wikipédia en Français

  • Formaldéhyde — Méthanal Méthanal Représentation du méthanal …   Wikipédia en Français

  • formaldehyde — /fawr mal deuh huyd , feuhr /, n. Chem. a colorless, toxic, potentially carcinogenic, water soluble gas, CH2O, having a suffocating odor, usually derived from methyl alcohol by oxidation: used chiefly in aqueous solution, as a disinfectant and… …   Universalium

  • formaldehyde — Aldehyde Al de*hyde ([a^]l d[ e]*h[imac]d), n. [Abbrev. fr. alcohol dehydrogenatum, alcohol deprived of its hydrogen.] 1. (Chem.) A colorless, mobile, and very volatile liquid obtained from alcohol by certain processes of oxidation. [1913… …   The Collaborative International Dictionary of English

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