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单词 formic acid
释义

formic acid


formic acid

n. A colorless caustic fuming liquid, CH2O2, used in dyeing and finishing textiles and paper and in manufacturing fumigants, insecticides, and refrigerants.
[From its natural occurrence in ants.]

formic acid

n (Elements & Compounds) a colourless corrosive liquid carboxylic acid found in some insects, esp ants, and many plants: used in dyeing textiles and the manufacture of insecticides and refrigerants. Formula: HCOOH. Systematic name: methanoic acid

for′mic ac′id


n. a colorless, irritating, fuming liquid, CH2O2, orig. obtained from ants and now made synthetically, used in dyeing and tanning and as a counterirritant and astringent. [1785–95]

for·mic acid

(fôr′mĭk) A colorless, caustic, fuming liquid, CH2O2, that occurs naturally as the poison of ants and stinging nettles. It is used in making textiles and paper and in insecticides.
Thesaurus
Noun1.formic acid - a colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam; used in finishing textiles and paper and in the manufacture of insecticides and fumigantsacid - any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
Translations

formic acid


formic acid

or

methanoic acid

(mĕth'ənō`ĭk), HCO2H, a colorless, corrosive liquid with a sharp odor; it boils at 100.7&degC; and solidifies at 8.4&degC;. It has the lowest molecular weight and is the simplest of the carboxylic acids. Functionally, it is both an acid and an aldehyde. Like other acids, it reacts with most alcohols to form esters and decomposes when heated; like other aldehydes, it is easily oxidized. Formic acid occurs in the bodies of red ants and in the stingers of bees. It can be made by the oxidation of formaldehydeformaldehyde
, HCHO, the simplest aldehyde. It melts at −92&degC;, boils at −21&degC;, and is soluble in water, alcohol, and ether; at STP, it is a flammable, poisonous, colorless gas with a suffocating odor.
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; it is prepared commercially by heating carbon monoxide and sodium hydroxide to form sodium formate which, when carefully treated with sulfuric acid, yields formic acid. Formic acid is used industrially in textile dyeing, in leather tanning, and in coagulating latex rubber.

Formic Acid

 

the simplest monobasic carboxylic acid, HCOOH. It is a colorless, highly mobile liquid with a sharp odor. Melting point, 8.25°C; boiling point, 100.7°C; density, 1.2126 g/cm (20°C). Formic acid is miscible in all proportions with water, alcohol, and ether; it forms an azeotropic mixture with water (77.4 percent formic acid; boiling point, 107.2°C). Formic acid causes burns upon contact with the skin.

Formic acid is the strongest fatty acid. In addition to properties typical of carboxylic acids (for example, the formation of salts and esters, called formates), it has reducing properties characteristic of aldehydes. For example, upon heating with an ammonia solution of silver oxide, it forms a “silver mirror.” Formic acid is found in fir needles, nettles, fruits, and the caustic secretions of bees and ants (it was discovered in the caustic secretions of ants as early as the 17th century; hence its name, derived from the Latin formica, meaning “ant”).

In industry, formic acid is produced mainly from solid sodium hydroxide and carbon monoxide (6–8 atmospheres at 120°-150°C). The resulting sodium formate, HCOONa, is decomposed by sulfuric acid.

Formic acid is used in mordant dyeing; for the decalcification of skins in their preparation for tanning; in the production of a number of catalysts (for example, nickel-containing catalysts); for the preparation of esters, formamide, and dimethylformamide; and in the canning of juices.

formic acid

[¦fȯr·mik ′as·əd] (organic chemistry) HCOOH A colorless, pungent, toxic, corrosive liquid melting at 8.4°C; soluble in water, ether, and alcohol; used as a chemical intermediate and solvent, in dyeing and electroplating processes, and in fumigants. Also known as methanoic acid.

formic acid

a colourless corrosive liquid carboxylic acid found in some insects, esp ants, and many plants: used in dyeing textiles and the manufacture of insecticides and refrigerants. Formula: HCOOH

formic acid


formic acid

 [for´mik] a colorless, pungent liquid with vesicant properties, from nettles and ants and other insects; derivable from oxalic acid and from glycerin and from the oxidation of formaldehyde.

for·mic ac·id

(fōr'ik as'id), HCOOH; the smallest carboxylic acid; a strong caustic, used as an astringent and counterirritant.

for·mic ac·id

(fōr'mik as'id) The smallest carboxylic acid; a strong caustic, used as an astringent and counterirritant.

formic acid (methanoic acid)

a colourless, corrosive, fuming liquid with a pungent smell. It occurs in ants and in certain plants and is the simplest of the CARBOXYLIC ACIDS. Formula: HCOOH.
AcronymsSeefanart

formic acid


  • noun

Words related to formic acid

noun a colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam

Related Words

  • acid
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