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, formol
a 40 per cent solution of formaldehyde in water, used as a disinfectant, preservative for biological specimens, etc.



(also Formol), an aqueous (usually 37–40 percent) solution of formaldehyde containing 4–12 percent methanol as a stabilizer; a colorless liquid with a characteristic pungent odor. During prolonged storage, especially in the cold, Formalin becomes cloudy as a result of the formation of a white precipitate— paraformaldehyde. It is used as a convenient source of formaldehyde, for example, in the preparation of polyvinyl formal. It is also used as an antiseptic and deodorant, for example, to disinfect dwellings, clothing, utensils, and hands, to preserve anatomical specimens, and for syringing. It is used in the tanning of leather and as a fungicide in the germination of seeds, tubers, and spermous root crops before sowing or planting.

Formalin is a component of formaldehyde paste and formidron, which are administered to persons suffering from hi-drosis, and lizoform, which is used for syringing and for disinfecting hands and dwellings. Formalin has a moderate toxic effect on humans and warm-blooded animals. [27–1609–1 ]


An aqueous solution of formaldehyde, usually 37% formaldehyde by weight.
References in periodicals archive ?
Historically, formalin has been the fixative of choice for visual examination of tissue (and it's because of this precedent that the molecular laboratorian will probably face an uphill battle in suggesting that alternative fixation agents may be more suitable for molecular testing).
Administration of formalin produced a typical pattern of flinching behavior.
All substances and extracts were administered orally 15 minutes before formalin administration into the right hind paw of the mouse.
22 ppm); poor ventilation in the dissection rooms; lack of strict and appropriate guidelines for handling embalmed cadavers and prosected specimens; or ignorance of consequences of formalin exposure (Balmes, 2004).
Farmers were allegedly told by wholesalers to treat fish with formalin.
Nicholson and Kunkle also devised a way to use WB to test for TSE in tissues that had been fixed in formalin and preserved in paraffin.
Salafia's papers revealed a handwritten record in which he detailed the chemicals he injected into Rosalia's body- formalin, zinc salts, alcohol, salicylic acid, and glycerin.
PCR is increasingly being used on serum and urine samples (9,13,14) to establish antemortem diagnosis but its use in demonstration of leptospiral DNA in fresh necropsy tissues has been scanty (9), perhaps because extraction of intact pathogen DNA from the hardened tissue cross-links created by formalin-fixation is difficult (15) and trace of formalin remaining with the template DNA interferes with PCR.
Beijing banned imports of Indonesian seafood apparently in retaliation of Jakarta announcing many products of candies and cosmetics from China were contaminated with formalin.
Zooplankton samples are generally preserved with 4% formalin solution.

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