Synonyms: Phosphonium,tetrakis(hydroxymethyl)-,chloride,polymer with urea;THPC-U;Phosphonium, tetrakis(hydroxymethyl)-, chloride, polymer with urea (8CI,9CI);Oligomer tetrakis(hydroxymethyl) phosphonium chloride-urea;Urea condensation products, with tetrakis(hydroxymethyl)phosphonium chloride (8CI);tetrakis(hydroxymethyl)phosphanium; urea; chloride;Urea-tetrakis(hydroxymethyl)phosphonium chloride polymer;Retardol AC;Phosphonium, tetrakis(hydroxymethyl)-, chloride, polymer with urea;