We are Offering sodium sulphate. Appearance solid powder odor odorless bulk density 1.26+/- 0.45 g/ml ph (sosp 1 pct) 6.5+/- 2.5 purity 99%min whiteness 87 min moisture 0.1% max water solubility 0.1% max specific gravity 1.46 % volatiles by volume @ 21c (70f) 0