Sodium Fluoride powder water treatment chemicals,water treatment agent Spec: Crystal or white powder Purity; 98% min Water insoluble matter: 0.7% max SO4: 0.3% max Moisture: 0.5% max Packing: in 25kg or1000 kgplastic woven bags with film lining Application:it is used in welding flux, toothpaste additive, water treatment chemicals,preservative, bactericide, slagging medium of metallurgy, adhesive, papermaking and constrution industry.