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  • CH2O, a colorless, pungent, carcinogenic, and toxic gas which can irritate membranes. It is used as formalin in its aqueous state (37%). Formaldehyde is reactive due to its carbonyl functional group. [Environmental Chemistry; Manahan Stanley E.; Lewis Publishers; Boca Raton; Florida; page 689; 1994.] [Environmental Chemistry; Moore, John W., et al; Academic Press; New York; page 49; 1976.]
    Source: Atmospheric Chemistry Glossary
  • A colorless, pungent, and irritating gas, CH20, used chiefly as a disinfectant and preservative and in synthesizing other compounds like resins.
    Source: Terms of the Environment

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