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Product Name

 POTASSIUM META BISULPHITE LR

Article No

 P0168000500

CAS No

 16731-55-8

Molecular Formula

 K2S2O5

Molecular Weight

 222.31

Specifications

Appearance:

 White crystalline powder

Chloride (Cl):

 Max 0.05%

Heavy metal (as Pb):

 Max 0.001%

Arsenic (As):

 Max 0.0002%

Iron (Fe):

 Max 0.002%

Copper (Cu):

 Max 0.0025%

Appearance of solution:

 Passes test

Assay (iodometric):

 95 - 99.9%

pH (5% solution in water):

 3 - 4.5

Zinc (Zn):

 Max 0.0025%

Mercury (Hg):

 Max 0.0001%

Thiosulphate:

 Passes test

Iodometric,SO2:

 54.8 - 57.6%

Selenium (Se):

 Max 0.0005%