Nyacol TFR-47 Colloidal antimony pentoxide Nyacol Flame retardant / Fire retardant >> Antimony oxide water Aqueous Dispersions of Colloidal Antimony Pentoxide Flame Retardant Additives NYACOL ®TFR-47 aqueous colloidal antimony pentoxide flame retardants in textile coatings Aqueous dispersion of colloidal antimony pentoxide. Used as a flame retardant in textile coatings.