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Shouguang Boyu Chemical Co.,Ltd.

18 YRS

Shandong, China

CNY 7.5 Million

36630 m²

Less than 50 people

Main Products: Sodium Bicarbonate / Sodium Sulfite / Magnesium Carbonate Hydroxide / Ammonium Bicarbonate

Shandong, China

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Sodium Metabisulfite / CAS 7681-57-4

Photo Grade：≥96.5%

OVERVIEW

Packaging

Pallets Packing	20'FCL		40'FCL
Pallets Packing	With	Without	With	Without
500 KG/Jumbo Bag	--	--	--	--
1000 KG/Jumbo Bag	--	--	--	--
25 KG/Paper Bag Photo Grade：≥96.5%	--	--	--	--
25 KG/Paper Bag	--	--	--	--
500 KG/Jumbo Bag Photo Grade：≥96.5%	--	--	--	--
25 KG/Woven Bag Photo Grade：≥96.5%	--	--	--	--
1000 KG/Jumbo Bag Photo Grade：≥96.5%	--	--	--	--
25 KG/Woven Bag	--	--	--	--

Lead Time

14-30 days

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DESCRIPTION

Sodium Metabisulfite

Property: White or yellowish crystalline powder, with strong SO2 smell, relative density of 1.4, easily soluble in water and glycerol, acidic aqueous solution, solubility increases with the increase of temperature, slightly soluble in ethanol. It is easy to oxidize and deteriorate in the exposed air, and continuously release SO2, and finally turn the product into sodium sulfate. Therefore, this product should not be stored for a long time. It will decompose when heated to 150 ℃.

Molecular Formula :Na2S2O5

Molecule Weight :190.12

CAS NO .:7681-57-4

Appearance :White Free Flowing Fine Crystal or Powder

Packing:Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer's requirement.

Specification For Food Grade and Industry Grade :

Item	Food Grade		Industry Grade
Purity(As Na2S2O5)	≥98.0%	≥97.0%	≥96.0%
Sulfur Dioxide(SO2)	≥65.0%	≥65.0%	≥65.0%
Arsenic(As)	≤0.0002%	--	≤0.0001%
Heavy Metals(As Pb)	≤0.0005%	--	--
Selenium(Se)	≤0.0005%	--	--
Iron(Fe)	≤0.002%	≤0.005%	≤0.005%
Water Insoluble	≤0.02%	≤0.05%	≤0.05%
PH Value	4.0-4.8	4.0-4.8	4.0-4.8
Remark	Conformed with FCCV and E223 Standard

Specification for Pharmaceutical Grade and Photo Grade

Item	Pharmaceutical Grade	Photo Grade
PURITY(AS Na2S2O5 )	≥96.0%	≥96.5%
SULFUR DIOXIDE(SO2)	≥65.0%	≥65.0%
CHLORIDE(As NaCL)	≤0.003%	≤0.005%
ARSENIC(As)	≤0.0001%	≤0.0001%
HEAVY METALS(As Pb)	≤0.0005%	≤0.0008%
SELENIUM(Se)	≤0.0001%	≤0.0005%
IRON(Fe)	≤0.001%	≤0.001%
Copper(Cu)	≤0.0001%	≤0.0001%
Nickel(Ni)	≤0.0001%	--
WATER INSOLUBLE	≤0.01%	≤0.01%
PH VALUE:	4.0-4.8	4.0-4.8

Typical Properties

It is used as preservative, bleach and loosening agent in food processing. In industry, sodium pyrosulfite is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; Sodium pyrosulfite is used in the chemical and pharmaceutical industries for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., as well as the purification of chloroform, phenylpropanesulfone and benzene formaldehyde. The photographic industry is used as an ingredient for fixing agents. Perfume industry is used to produce vanillin. It is used as preservative in brewing industry, rubber coagulant and dechlorination agent after cotton bleaching. Organic intermediates, dyes and tanning are used as reducing agents, electroplating industry, oilfield wastewater treatment and mineral dressing agent in mines.

CAS No.

7681-57-4

Formula

Na2O5S2

Molecular Mass

190.10700

Exact Mass

189.89800

PSA

124.92000

Logp

0.27220

IUPAC

Sodium metabisulfite

SMILES

[O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+]

Matter Classification

inorganic

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