1, usage:Textile,Medicine,Food and Rubber industry 2, high quality and reasonable price 3, promptly delivery English Name: SODIUM METABISULPHITE SPECIFICATIONINDUSTRIAL GRADEFOOD GRADEContent(as SO2) %≥6565Water-insoluble Matter, % ≤0.050.05Iron(Fe), % ≤0.0030.003PH4.0-4.64.0-4.6Arsenic (As), % ≤ 0.0002Lead (Pb), % ≤ 0.002 Packing: In 25kg / 1000kg bag. white or yellowish Sodium Metabisulphite