Formula: K₂SnO₃.3H₂O

Mol.Wt:  298.95

C.A.S.No.:12027-61-1

Description:

White or off-white flowing powder

Specification:

     Tin content as Sn           38.00%min

      Tin content as SnO₂      48.20%min

      Free caustic alkali           1.50%max

      Insoluble in 1% KOH     0.25%max

      Lead as Pb                      0.025%max

      Antimony as Sb              0.05%max

      Arsenic as As                  0.01%max

      Nitrate as KNO₃                    0.25%max

      Chloride as KCl              1.00%max

Storage:

Store in airtight containers. In the presence of moist air potassium stannate absorbs carbon dioxide and will become less soluble in water.

Grades:

As above

Package:

25Kg polyethylene lined steel drums packages supplied meet with UN performance standards where appropriate. Special packaging requirements can be accommodated

Used

 Automotive: As a source of tin for the ommersion tinning of aluminium alloys (eg. internal combustion engine pistons)

Metal finishing: As a tin plating salt in alkaline in plating baths