paraformaldehyde

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paraformaldehyde:

see formaldehydeformaldehyde
, HCHO, the simplest aldehyde. It melts at −92°C;, boils at −21°C;, 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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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Paraformaldehyde

 

(also paraform), a mixture of formaldehyde polymerization products, called polyoxymethylenes, of the general formula (—CH2O—)n where n is any integer from eight to 100. Paraformaldehyde is a white, crystalline substance with a melting range between 105° and 150°C. It is obtained by evaporating concentrated, aqueous solutions of formaldehyde in vacuo. Paraformaldehyde is a convenient source of formaldehyde.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

paraformaldehyde

[¦par·ə·fȯr′mal·də‚hīd]
(organic chemistry)
(HCHO)n Polymer of formaldehyde where n is greater than 6; white, alkali-soluble solid, insoluble in alcohol, ether, and water; used as a disinfectant, fumigant, and fungicide, and to make resins.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
To determine the cell surface area, cells were fixed with 4% paraform and then permeabilized within 0.5% TritonX-100, after which cells were incubated with TRITC-labeled phalloidin (Sigma) for 30 min at room temperature as methods reported [20].
In this case methanol was used as the solvent instead of water and paraform and KOH were dissolved in methanol.
The phenolic resin component consisted of phenol (70.5 g), paraform (30 g), zinc acetate (0.03 g), toluene (3.7 g), and dioctyl phthalate (22.5 g).
The technology is now being produced commercially by Paraform of Santa Clara, Calif.
Paraform, which digitally scans humans for use in a film's f/x sequences, was awarded a certificate.
Paraform, Inc., a provider of Digital Form Development, has launched Paraform 1.5, the company's latest software offering, which greatly expands the range of possible user applications, while providing a highly scalable, easy-to-use solution.
Brands: Paratherm, Paraskin, Paramoll, Paraprint, Parabond, Paradur, Parafil, Paraform Applications: Filtration, coating substrates, hygiene, automotive, conveyor belts
Brand Names: Paratherm, Paraskin, Paramoll, Paraprint, Parabond, Paradur, Parafil, Paraform
Brand Names Paratherm, Paramoll, Paraskin, Paraprint, Parabond, Parafil, Paratherm loft, Paraform