Sell sodium tripolyphosphate(STPP)

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Items Spec Testing results
Na5P3O10, 95 % Min 95.45%
P2O5 , % 57min 57.5
Arsenic as As, ppm 3Max <0.5
Heavy Metal as Pb, ppm 10Max <0.5
Chloride ( Cl ) , % 0.025Max <0.01
Sulfate ( SO4 ) , % 0.4Max <0.01
Insoluble Substance, % 0.05Max 0.001
Ortho Phosphate No dark yellow No dark Yellow
PH Value ( 1% ) , 9.5-10.0 9.65
Loss On Drying (1100, 4hr ) , % 2Max 0.48

Through sieve, % 10mesh 99.63%
( Dry Sieving ) 30mesh 85.52%
Pass Ratio 50mesh 28.40%
70mesh 1.75%

B) Description:
Sodium Tripolyphosphate, Anhydrous is a white granule
CAS Number: 7758-29-4
CAS Index Name: Triphosphoric Acid, Pent sodium Salt
INS No. : 451 ( i )
EEC No. : E450 (b) .