POTASSIUM META BISULPHITE LR

Article No. Grade Purity Cas no. Molecular Formula Molecular Weight H.S. Code Shelf Life
P0168005000 LR 95% 16731-55-8 K2S2O5 222.31 2832.2010
60 Months

Physical Properties

Physical state at 20 °C

Solid

Colour

White crystalline

Odour

Odorless

pH value

3-4.5 at 22.2 g/l at 25 °C

Melting Point/ Freezing point [°C]

150°C

Decomposition point [°C]

150°C

Vapour density

2.3

Density [g/cm3]

2.34

Viscosity at 40°C [mm2/s]

22.2 g/l at 20 °C

Solubility in water [% weight]

22.2 g/l at 20 °C

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%

Safety Information and Hazard Symbols

Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338
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Globally Harmonized System of classification and Labelling of Chemicals (GHS)

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