POTASSIUM METABISULFITE

 

SYNONYM: POTASSIUM PYROSULFITE

 

FORMULA: K2S2O5

 

M. W.: 222.33

 

CAS NO.: 16731-55-8

 

DESCRIPTION: WHITE CRYSTAL OR CRYSTAL POWDER WITH EXCITED SULFUR DIOXIDE SMELL. EASY SOLUBLE WATER, INSOLUBLE ETHANOL, ETHYL. ASSUMED ACID REACTIVE. WHEN MEET ACID WILL RUN OFF SULFUR DIOXIDE. IT IS SLOWLY OXIDIZED BECOME SULFATE IN AIR. AND IT IS QUICKLY OXIDIZED IN WET AIR. IT CAN BURNING AFTER GRINDED BECOME POWDER. AT 190℃ DECOMPOSE, DENSITY RELATIVE 2.34.

 

SPECIFICATIONS:

ITEM

FIRST

SECOND

CONTENT

94% MIN.

93% MIN.

WATER-INSOLUBLE

0.02% MAX.

0.05% MAX.

CHLORIDE (Cl)

0.01% MAX.

0.02% MAX.

IRON (Fe)

0.002% MAX.

0.005% MAX.

ARSENIC (As)

0.0003% MAX.

0.0005% MAX.

HEAVY METALS (AS Pb)

0.002% MAX.

0.005% MAX.

 

USES: FOR REDUCING AGENT, DEVELOPER, GERM INGIBITOR AND ANTI OXIDANT. FOR MAKING THE SUBUROUR ACID.

 

PACKING: IN PP WOVEN BAG OF 25KGS NET EACH, 18MT/20’FCL.