sodium pyrosulfite

1.industry sodium pyrosulfite 2Classification: Sulphate 3 Type: Sodium Metabisulfite 4 CAS No.: 7681-57-4 5 MF: Na2S2O5

1industry sodium pyrosulfite Classification: Sulphate	Type: Sodium Metabisulfite	CAS No.: 7681-57-4
Other Names: metabisulfite	MF: Na2S2O5	EINECS No.: 231-673-0
Place of Origin: Shandong China (Mainland)	Grade Standard: Agriculture Grade, Food Grade, ...	Purity: 98%
Appearance: white	Application: chemical meterial	Brand Name: zhengtong
Model Number: M-008	crystal: white

Packaging & Delivery

Packaging Detail:	Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag,
Delivery Detail	Within 10-15days after payment

Specifications

1.Both food & tech grade 2.Steady high quality 3.Nicest price &Good service 4.Prompt delivery

Property: white or light yellow crystal powder, a strong smell of sulfur dioxide,relative density is 1.4, easy to dissolve in water and glycerin, water solution. It has acidity,and its solubility will become large while raising the temperature and is less to dissolve in ethanol.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	Quality Index
	Food Grade	Industry Grade
Purity ( As Na2S2O5)	98.0% min	96.0% min
Sulfur Dioxide( SO2)	65.0% min	65.0% min
Arsenic ( As )	0.0002% max	-
Heavy metals ( As Pb )	0.0005% max	-
Selenium (Se )	0.0005% max	-
Iron (Fe)	0.001% max	0.002% max
Water insoluble	0.02% max	0.05% max
PH value :	4.0-4.8	4.0-4.8
Remark :	Conformed with FCC V and E 223 Standard

 

Specification for Pharmaceutical Grade and Photo Grade  

Item	Quality Index
	Pharmaceutical Grade	Photo Grade
Purity ( As Na2S2O5)	98.0% min	98.0% min
Sulfur Dioxide( SO2)	65.0% min	65.0% min
Thiosulphate ( As S2O3) :	0.05 % max	0.05% max
Chloride ( As CL-) :	30 ppm max	50ppm max
Arsenic ( As ) :	1ppm max	1ppm max
Lead ( Pb ) :	1 ppm max	2ppm max
Copper (Cu) :	1 ppm max	1ppm max
Iron (Fe ) :	5 ppm max	5ppm max
Mercury (Hg) :	0.1ppm max	1ppm max
Chromium (Cr) :	1 ppm max	-
Selenium (Se ) :	1 ppm max	5ppm max
Zinc (Zn)	1 ppm max	1ppm max
Cadmium (Cd )	1ppm max	-
Nickel (Ni)	1ppm max	-
Na2SO3 + Na2SO4	1.5% max	-
PH value :	4.0-4.8	4.0-4.8
Remark :	Conformed with USP standard

 

Application:

(1) Food Grade: Bleach agent (e.g. candies, cake, bamboo shoots, etc); Loose agent (e.g. bread, cracker etc); Antiseptic and germicide (e.g. fruit juice, tinned food, brews, the cereals food is defended storage etc); Inhibitor and freshen agent (e.g. day lily, seafood, fruit and vegetable etc).

(2) Industry Grade: Mordant of printing and dyeing; Dechlorinate of textile after bleaching; Sulphonated agent and reducer of chemical industry and pharmacy; Bleach of paper pulp, bamboo and timber bleach of Stap; Treatment agent of waste water; Rubber solidifying agent Perfume industry is served as hydro carbon perfume aldehyde The hide profession employ to do to molt dose and pliable dose and wearproof dose; sewage treatment, and so on .

(3) Pharmaceutical Grade: In chemical synthesis in the production of acrylic fibre, vitamin K, vitamin A, pharmaceutical intermediates, etc..

Storage: Store the product in a dry and cool place.

sodium pyrosulfite