CAS No.: | 7681-57-4 |
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Appearance: | Powder |
Classification: | HS |
Certification: | CCIC, CIQ, RoHS, ISO |
Purity: | 90%~99% |
Type: | Sodium Sulfide |
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Items | Technical grade | Food grade |
Assay | 96% min | 97% min |
Assay as SO2 | 65% min | 65% min |
Water insoluble | 0.05% max | 0.05% max |
Ferric (Fe) | 0.003% max | 0.003% max |
pH value | 4.0-4.6 | 4.0-4.6 |
Lead (Pb) | ** | 0.002% max |
Arsenic (As) | ** | 0.0002% max |
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