Industrical grade | Standard | Results |
Content ( as Na 2 S2O 5 ) %≥ | 96.5 | 97. 2 |
Phase | White or light yellow crystalline powder | White or light yellow crystalline powder |
Appearance of solution | - | Colorless and transparent |
Nacl %≤ | - | 0.02 |
Iron ( as Fe ) %≤ | 0.005 | 0.0009 |
Arsenic ( as As ) %≤ | 0.0001 | 0.0001 |
Heavy metal(as Pb)% ≤ | 0.0005 | 0.0005 |
PH Value | 4.0-4.6 | 4.48 |
Water Insoluble %≤ | 0.05 | 0.03 |