SPECIFICATION: STANDARD …
SPECIFICATION: | STANDARD |
Na2S2O5 | 97% min. |
SO2 | 65%min. |
Iron | 0.005%max. |
Water insoluble matter | 0.05%max. |
Heavy metals as Pb | 0.001%max. |
Arsenic | 0.0001%max. |
PH | 4-4.5 |
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