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| PARAMETERS | STANDARD | |
| Food grade | Tech grade | |
| Sodium metabisulphite: | 95% MIN | 95%MIN |
| SO2: | 65% MIN | 65.0%MIN |
| Water insoluble: | 0.05% MAX | 0.05%MAX |
| Iron(as Fe): | 50PPM MAX | 0.005%MAX |
| Heavy metal(as Pb): | 20PPM MAX | -- |
| PH: | 4.0--4.6 | 4.0-4.6 |
| Chloride(as Cl): | -- | -- |
| Arsenic(as As): | 2PPM MAX | -- |
Sodium Metabisulphite