Product Description

GENERAL DESCRIPTION & APPLICATIONSrn rnSodium Metabisulfite is a white to slightly yellowish crystalline powder with sulfur dioxide odor; readily soluble in water. Sodium metabisulfite containing more than 65.0% SO2 w/w releases sulfur dioxide gas when mixed with water.rnrn rnrn rnrn rnrnIt forms a bisulfite adduct with aldehyde and with ketones to a sulfonic acid. It is used to purify or isolate aldehydes and ketones. Sodium metabisulfite's reductive and sulfonating properties provide versatile applications. It is used as an oxygen scavenger to eliminate the dissolved oxygen in waste water and in pipes.rnrn rnrnBisulfite is a reductive bleaching agent. It reduces carbonyl and alcohol groups, which function as colorants of the substances. It is used in bleaching mechanical paper pulp, cotton, wool and kaolin clay. Additional applications include as a preservative (antioxidant), a hair waving agent, and Ensiling agent. Bisulfites are used in industries concerned with leather processing, food and beverage processing, gas purification, water treatment to remove excess chlorine, textiles and pulp processing, and many others.rnrn rn

Product Feature

PHYSICAL AND CHEMICAL PROPERTIESrn rnPHYSICAL STATErn white crystalline powder with odor of sulfur dioxidern rnMELTING POINTrn 150 C (Decomposes)rn rn rn rnSPECIFIC GRAVITYrn 1.48rn rnSOLUBILITY IN WATERrn Freely soluble (470g/l)rn rnpHrn 3.5 - 5rn rn rn rn rn rnNFPA RATINGSrn Health: 1; Flammability: 0; Reactivity: 0rn rn

Product Specification / Models

SODIUM METABISULFITErn rnPRODUCT IDENTIFICATIONrn rnCAS NO.rn 7681-57-4rn rn rnEINECS NO.rn 231-673-0rn rnFORMULArn Na2S2O5rn rnMOL WT.rn 190.10rn rn rn rn rn

Application / Models

It is used as a reducing agent in chemical manufacturing. It is an alternative to sulfur dioxide which is used in sterlization of equipment.rnrnExamples of other metallic bisulfiternrnCalcium Bisulfite [13780-03-5, Ca(HSO3)2] A white powder, used as an antiseptic and in pulping process. rnPotassium Bisulfite [1310-61-8, KHSO3] Also called potassium acid sulfite, white, water-soluble powder with sulfur dioxide odor; insoluble in alcohol; decomposes when heated; used as an antiseptic and reducing chemical, tanning, and bleaching. rnMagnesium Bisulfite [13774-25-9, Mg(HSO3)2] rn rnrn

Other Information

SALES SPECIFICATIONrn rnTECH GRADE：rn rnAPPEARANCErn White to slightly yellowish crystalline powderrn rnCONTENTrn 98.0% minrn rnSO2rn 65.0% minrn rnNa2S2O4rn 2.0% maxrn rnINSOLUBLES IN WATERrn 0.05% maxrn rnPARTICLE SIZErn 85% (mesh 200)rn rnpHrn 4 -4.6rn rnFern 5ppm maxrn rnFOOD GRADErn rnAPPEARANCErn White to slightly yellowish crystalline powderrn rnCONTENTrn 98.0% minrn rnSO2rn 65.0% minrn rnNa2S2O4rn 2.0% maxrn rnINSOLUBLES IN WATERrn 0.05% maxrn rnPARTICLE SIZErn 85% (mesh 200)rn rnHEAVY METALSrn 10ppm maxrn rnAsrn 1ppm maxrn rnFern 5ppm maxrn rnpHrn 4.5 - 5.5rn rn rn rnPACKINGrn 25kgs in bagrn rn