Weifang Rui Desheng Chemical Co., Ltd. mainly produces food grade sodium metabisulfite sales information, 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 Rui Desheng Chemical Co., Ltd. Weifang Uses: used in dyeing industry, organic synthesis, printing, leather, pharmaceutical and other sectors; as a preservative, sodium metabisulfite] [bleach in food processing | Sodium metabisulfite Sale Information | 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