appearance

white powder

Assay ( Na5P2O10)

≥90%

inactive phosphate, as P2O5

≥57%

Water insoluble matter

≤ 0.15%

Iron(Fe) %≤

≤0.01 %

PH value(1% solution)

9.5 –10.0

Flouride as F

≤50ppm

Cl

≤0.025%

Heavy metals as pb

≤10ppm

arsenic as AS

≤3ppm

lead as pb

≤5ppm

bulk density g/cm3

0.8-0.95