Sr. No. Characteristics Requirement to
Grade A Grade B
01 Appearance Anhydrous, white powder, odourless, bitter saline test Anhydrous, white powder, odourless, bitter saline test
02 Solubility Soluble in water and glycerol, insoluble in alcohol Soluble in water and glycerol, insoluble in alcohol
03 Density 1.385 1.385
04 Sodium Sulphate (as Na2SO4) per cent by mass (on dry basis) 99.0 % min. 98.0 % min.
05 Matter insoluble in water per cent by mass 0.25 % max. 0.50 % max.
06 Chloride (as NaCl) per cent by mass 0.30 % max. 2.00 % max.
07 Iron (as Fe) per cent by mass 0.002 % max. 0.002 % max.
08 Loss on drying per cent by mass 0.5 % max. 1.0 % max.
09 pH of 10 % solution 7.0 to 7.5 7.5 to 8.0
Note :- The product can also be supplied as per specifications provided by the client’s

Packing & Marking :- As per client’s requirements.