Product Name: Sodium metabisulphite/Sodium metabisulfite Food Grade/Industrial Grade Model NO.: 97%min Grade Standard: Industrial Grade Appearance: Powder Type: Sodium Sulfate Purity: ?99% Certification: CCIC, CIQ, SGS, RoHS, ISO Application: Water Treatment Trademark: YUYIN Transport Package: 25kg/500kg/1000kg/PP Bag Specification: HIGH CLASS Origin: China HS Code: 28321000 Product Description MolecularFormula:Na2SO3CASNo:7681-57-4HSCode:28321000Main Uses:1) Industrial Grade: Dyeing mordant, dechlorinating agent for washed fabric, medical deoxidizer and sulfonating agent, bone black for bamboo, wood and paper fiber, non-ferrous mineral separation agent, waste water disposing agent, rubber coagulator.2) Food Grade: Bleaching agent (for sugar, pastry, dried slices of tender bamboo shoots, etc), loosening agent (for bread, biscuit, etc), corrosion protection antiseptic (fruit juice, can, etc), antioxidant (for lily flower, sea food, fruit, vegetable, etc)Packaging:25kg/500kg/1000kg/PP bagSpecification:Sodiummetabisulphite IndustrialGrade ITEMSPECIFICATIonTEST RESULTPURITY (AS Na2S2O5):97.0% MIN97.3%SO2 65.0%MIN 65.5%HEAVY metaL (AS Pb) : 0.001%MAX 0.0008%WATER INSOLUBLE : 0.05%MAX 0.02%IRON (Fe) : 0.003%MAX 0.0018%PH VALUE:4.0-4.64.5Sodiummetabisulphite FoodGrade ITEMSPECIFICATIonTEST RESULTNa2S2O5 content :97.0 %min97.23%Heavy metals (as Pb) :0.0005%max0.0004%Arsenic (As) :0.0001%max0.0001%Iron (Fe) :0.0020%max0.0012%Water insoluble :0.02%max0.01%PH Value : 4.0-4.54.4