formaldehyde (redirected from HCHO)

formaldehyde /for·mal·de·hyde/ (for-mal´dĭ-hīd) a gas formerly used as a strong disinfectant; now used as an aqueous solution (see formaldehyde solution, under solution ). The gas is toxic by inhalation or absorption and is carcinogenic.

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for·mal·de·hyde (fôr-mld-hd)

n.

A colorless, gaseous compound that is the simplest aldehyde, used for manufacturing melamine and phenolic resins, fertilizers, dyes, and embalming fluids and in aqueous solution as a preservative and disinfectant.

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formaldehyde (HCHO)

[fərmal′dəhīd]

a toxic, colorless foul-smelling gas that is soluble in water and used in that form as a disinfectant, fixative, or preservative. Also called methanol.

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formaldehyde

(formal´dhīd´),
n a toxic, pungent water-soluble gas used in the aqueous form as a disinfectant, fixative, or tissue preservative.

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formaldehyde

a gaseous compound with strongly disinfectant properties. It is used in solution (formol) for disinfection of excreta and utensils and also in the preparation of toxoids from toxins, and as a gas for the fumigation of hatching eggs. As formalin also used in the treatment of grain and forage and causes enteritis if the feed is improperly mixed.

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formaldehyde hypersensitivity

causes an allergic contact dermatitis.

formaldehyde-malachite green

a treatment for external parasites in aquarium fish.

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formaldehyde

H₂C=O, methanal Occupational safety A highly toxic, flammable gas that is highly irritating to the respiratory and conjunctival mucosa at concentrations > 2 ppm; formaldehyde is soluble in water and forms methylene bridges between denatured proteins. See Formalin.