#	Criteria	Specification
1	SODIUM SULPHATE (as Na2SO4)	99.5 Min
2	Matter Insoluble in Water	0.01 Max
3	Chlorides (as NaCl)	0.02 Max
4	Iron as Fe	0.001 Max
5	Loss of Drying	0.50 Max
6	Ph (of 10% Solution)	7.5 - 9.5
7	Iron, Aluminium & Chromium (as R203)	0.02 Max
8	Moisture (%)	0.02 Max
9	Bulk Density (Gm./CC)	1.2 - 1.6
10	Loss On Ignition at 6000C	< 0.05%
11	CaSO4 + MgSO4 (as Calcium)	40 ppm
12	Sieve Test	+ 60 Mesh 0.70% + 60 Mesh 0.70% + 150 Mesh 70.4% + 240 Mesh 95.2%
13	Description	Free flowing white powder