Peracetyl borate is a chemical combining peracetic acid crystallised with acetic acid and sodium tetrahydroxyborate. (Na2B4O5(OH)4.•CH3COOH•2CH3COO2H.

When it reacts with water, peracetic acid is released.

Peracetyl borate is used to decontaminate biological and chemical warfare agents, and opioid contamination. It works by forming N-oxides that do not have the same physiological effect. It is found in a commercial product called Dahlgren Decon.

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