Sodium Antimonate SA-F Molecular Formula NaSbO3 Appearance White powder CAS Number 15432-85-6 Sb 61.0 % min Crystal water hydrate 1.0% max Mean Particle Size 2.0 ¼ m max Plastic bag protected by knitting bag, 25kg or 1000kg net weight. Used as flame-retardant in engineering plastic like PET.