1. Industrial grade sodium metabisulphite
1) Purity (calculated with Na
2S
2O
5): 95%
2) Iron (Fe): 0.005%
3) SO
2: 65%
4) pH value: 4.0-4.6
5) Water insoluble matter: 0.05%
2. Foodstuff grade sodium metabisulphite
1) Purity (calculated with Na
2S
2O
5): 95%
2) Iron (Fe): 0.0005%
3) Arsenic (As): 0.0002%
4) pH value: 4.0-4.6
5) Water insoluble matter: 0.05%
6) Heavy metal (Cal. in Pb): 0.002%
Packing: 25kg, 50kg per woven bag with plastic lining, or 1000kg per package
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