Sodium metabisulfite CAS No. :7681-57-4 EINECS No. :231 -673-0 Formula: Na2S2O5 Molecular Weight: 190.09 Grade: food grade, industrial grade sodium metabisulfite formula, pharmaceutical grade, photographic grade. Storage: Sealed, Shandong, sodium metabisulfite, prohibiting contact with strong acids and strong oxidants Appearance: white or light yellow crystalline powder or small crystals falling stored color gradient yellow Packaging: 25 kg plastic bags, brown paper bags of 25 kg coke sodium sulfite, 25 kg polyethylene bags, 1000 kg of tons of packages or according to customer requirements. What Weifang Rui Desheng Chemical Co., Ltd. mainly produces food grade sodium metabisulfite is industrial grade sodium metabisulfite, there is a need, please contact 0536-5330114, Fax 0536-5300069 food grade industrial grade purity (with Na2S2O5 dollars) ≥ 98% ≥ 97% of sulfur dioxide (SO4) ≥ 65.0% ≥ 65.0% Arsenic (As) ≤ 0.0002% Heavy metals (as Pb) ≤ 0.0005% selenium (Se) ≤ 0.0005% Iron (Fe) ≤ 0.001% ≤ 0.002% Water insoluble ≤ 0.02% ≤ 0.05 % PH value 4.0-4.8 4.0-4.8 [metabisulfite] | Shandong metabisulfite | Rui Desheng Chemical provided by 瑞德胜 chemical. Welcome to consult Weifang Rui Desheng Chemical Co. (www.ruidesheng.com), be sure to specify when contact is through the "Business Alliance Member" see, thank you! Contact: Liqing Jie