Sodium metabisulfite chemical formula

Sodium Metabisulfite/Sodium Pyrosulfite Molecular formula : Na2S2O5                                                     Molecular weight : 190.10 Appearance :  white or light yellow crystalline powder , relative density is 1.4.         Applications: - 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. Bisulfite 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. - leather processing, food and beverage processing, gas purification, water treatment  to remove excess chlorine, textiles and pulp processing. - It is used as a reducing agent in chemical manufacturing. - It is an alternative to sulfur dioxide which is used in sterlization of equipment.    Quality standard : GB1893-2008

Item	Company standard
Assay ( as Na2S2O5 ) % ≥	96.5
Fe % ≤	0.003
Clarity	clear
Heavy metal (Pb)% ≤	0.001
As % ≤	0.0002

  Packing : External packing is PP woven bag, Internal packing is PE bag, the thickness ≥0.05mm. There are "food additives Sodium metabisulfite" printed on the external packing, with the sign of "Avoid moisture and heat". The trademark is "Sanxiang" .   Storage & defence: Stored in cool and dry place, aovid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid raining.   Netwt: 25kg, 50kg, 1000kg/bag or according to the requirement of customer.   Company : Hunan Yueyang Sanxiang Chemical Co., Ltd.
Address : Qilishan community, Yueyang, Hunan, China
Tel : +86-730-8555768
Fax :+86-730-8555728
Contact person : Kerry Xiao Moblie phone: 0086-13762006068