FIELD: chemistry.
SUBSTANCE: invention relates to biocides. The method involves stabilising an aqueous composition of a phosphonium compound containing arsenic as an impurity by adding an amount of a compound which is effective for stabilisation of arsenic, said compound being selected from a group consisting of ammonia, an ammonium salt, an organic amino acid, a peptide and a polypeptide. The aqueous composition of phosphonium compound containing arsenic as an impurity is stabilised using said method.
EFFECT: invention increases stability of the product.
12 cl, 1 tbl, 5 ex
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