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Free cyanide is the primary toxic agent in the aquatic environment. Free cyanide refers to the sum of molecular HCN and the cyanide anion (CN ), regardless of origin. In aqueous solution with pH 9.2 and lower, the majority of the free cyanide is in the form of molecular HCN. The chemical names for HCN include hydrogen cyanide, hydrocyanic acid, cyanohydric acid, and prussic acid. [Pg.909]

See also in sourсe #XX -- [ Pg.905 ]

See also in sourсe #XX -- [ Pg.905 ]

See also in sourсe #XX -- [ Pg.203 ]