Sodium Tripo;yphosphate

STPP Na5P3O10
MW: 367.86
Melting point: 622 ℃
Na5p3o10 % ≥ 95.0
p2o5 % ≥ 57.0
water insoluble % ≤ 0.05
F % ≤ 0.003
As % ≤ 0.00013
Heavy metals (Pb) % ≤ 0.001
chloride (Cl) % ≤ 0.025
sulphate (so4) % ≤ 0.4
whiteness % ≥ 85
ph(1% aqueous solution) 9.5-10.0
Item Index
class product, first-class products, qualified product
whiteness:% MIN 90.0 85.0 80.0
Phosphorus pentoxide (P2O5),% MIN 57.0 56.0 55.0
STPP (NA5P3O10) content,% MIN 96.0 90.0 85.0
Water insoluble content,% MAX 0.10 0.10 0.15
Fe (FE),% MAX 0.007 0.015 0.030
PH value (1% solution) 9.2-10.0
yang87eva gmail com
thhgywl hotmail com