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Molecule of the week Glyoxal

Molecule of the week Glyoxal. Chemical Structure. Crystalline powder, nonhygroscopic . More sol in hot water than in cold water. Commercially available in anhydr form as crystalline dihydrate , or as a 40% aq soln which may contain polymerization inhibitors. Chemical Formula.

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Molecule of the week Glyoxal

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  1. Molecule of the weekGlyoxal

  2. Chemical Structure Crystalline powder, nonhygroscopic. More sol in hot water than in cold water. Commercially available in anhydr form as crystalline dihydrate, or as a 40% aqsoln which may contain polymerization inhibitors

  3. Chemical Formula C2H2O2

  4. Molecular Mass 58.197 amu

  5. Density 1.265 g/cm3 1.4 g/cm3 (20° C)

  6. Commercial Uses Coated paper and in the textile finishes use large amounts of glyoxal for wrinkle-resistant chemical treatments. It is used as a solubilizer and cross-linking agent in polymer chemistry.

  7. Health Effects • Varies from low to harmful in animal experiments performed with different species, depending on the active ingredient concentration of the tested product. • Has 40% toxicity a moderate toxicity by the oral route, a low toxicity by the dermal route and a moderate toxicity by inhalation. • Causes slight to definite skin irritations depending on the exposure duration.

  8. Common Name Dialdehyde

  9. First prepared by N. Lubawin In 1875, Lubawin oxidized acetaldehyde with HNO3 or H2SeO3. The HNO3 method is still used commercially, along with metal-catalyzed gas-phase oxidation of ethylene glycol. At low temperatures, glyoxal forms yellow crystals; it melts at 15 °C and boils at 51 °C. Its low flash point (–4 °C) makes its green vapor explosive in air.

  10. Bibliography • http://www.drugfuture.com/chemdata/Glyoxal.html • http://portal.acs.org/portal/acs/corg/content • http://portal.acs.org/portal/acs/corg/content?_nfpb=true&_pageLabel=PP_ARTICLEMAIN&node_id=841&content_id=CNBP_029696&use_sec=true&sec_url_var=region1&__uuid=49422ad5-e13e-41f7-a225-adf9e12dba1f

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