sodium pyrosulfite 98%

sodium pyrosulfite 98% 1.Industry grade 2.Steady high quality 3.Purity:98% 4.Prompt delivery sodium pyrosulfite98% Industry Grade Sodium metabisulphite

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.

(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.

(4) Photo Grade: The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose.

Storage: Store the product in a dry and cool place

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
	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

sodium pyrosulfite 98%