formaldehyde

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 Webster]

2. (Chem.) Any compound having the group {-CHO}. Methyl aldehyde, the simplest aldehyde, is more commonly called formaldehyde, {H-CHO}, and acetic aldehyde is now more commonly called {acetaldehyde}. The higher aldehydes may be solids. A {reducing sugar} typically contains the aldehyde group. [PJC]

Note: The aldehydes are intermediate between the alcohols and acids, and differ from the alcohols in having two less hydrogen atoms in the molecule, as common aldehyde (called also {acetaldehyde}, {acetic aldehyde} or {ethyl aldehyde}), {C2H4O}; methyl aldehyde (called also {formaldehyde}), {CH2O}. [1913 Webster +PJC]

{Aldehyde ammonia} (Chem.), a compound formed by the union of aldehyde with ammonia. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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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

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