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Showing results for paraformaldehyde. Search instead for polyformaldehyde.

paraformaldehyde

American  
[par-uh-fawr-mal-duh-hahyd, -fer-] / ˌpær ə fɔrˈmæl dəˌhaɪd, -fər- /

noun

Chemistry.
  1. a white, crystalline polymer of formaldehyde, (HCOH) n , from which it is obtained by evaporation of the aqueous solution: used chiefly as an antiseptic.


paraformaldehyde British  
/ ˌpærəfɔːˈmældɪˌhaɪd /

noun

  1. a white amorphous solid polymeric form of formaldehyde: used as a convenient source of formaldehyde and as a fumigant. Formula: (CH 2 O) n , where n lies between 6 and 50

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of paraformaldehyde

First recorded in 1930–35; para- 1 + formaldehyde


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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Four days later the cultivated embryos were preserved in paraformaldehyde and shipped back to Earth, where a team led by molecular biologist Teruhiko Wakayama of the University of Yamanashi studied the results.

From Salon ● Oct. 30, 2023

The number of cells that test positive for DCX in brain tissue declines sharply after just 48 hours in a paraformaldehyde bath, Llorens-Martín and her colleagues report today in Nature Medicine.

From Science Magazine ● Mar. 25, 2019

Over time, paraformaldehyde forms bonds between the components that make up neurons, turning the cells into a gel, says neuroscientist María Llorens-Martín of the Severo Ochoa Molecular Biology Center in Madrid.

From Science Magazine ● Mar. 25, 2019

Embryos and cells were fixed with 4% paraformaldehyde in PBS for 1 h and overnight, respectively, at 4 °C and immunofluorescently analysed as described previously2.

From Nature ● Sep. 19, 2017

In addition to formaldehyde, paraformaldehyde, trioxymethylene, methylal, hexamethylene-tetramine, and other substances containing a reactive methylene group, as well as acetaldehyde, benzaldehyde and other aldehydes may be employed to induce reaction.

From Synthetic Tannins by Georg Grasser

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