55818-96-7 PYROSET TKP Phosphonium, tetrakis(hydroxymethyl)-, acetate (salt), mixture with tetrakis(hydroxymethyl)phosphonium phosphate (3:1)(salt) Phosphonium, tetrakis(hydroxymethyl)-, acetate mixed with tetrakis(hydroxymethyl)phosphonium dihydrogen phosphate (76:24) Pyroset Flame Retardant TKP Tetrakis(hydroxymethyl)phosphonium acetate/phosphate