Food grade
Standard
Results
Content ( as Na 2 S2O 5 ) %≥
9 7.0
97. 5
Phase
White or light yellow crystalline powder
Appearance of solution
-
Colorless and transparent
Nacl %≤
0.02
Iron ( as Fe ) %≤
0.003
0.0009
Arsenic ( as As ) %≤
0.0001
Heavy metal(as Pb)% ≤
0.0005
PH Value
4.0-4.6
4.42
Water Insoluble %≤
0.05
0.03
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