CAS: 128-37-0.

Appearance: White crystal.

Content: 99.4% min.

M.P.: 69-70℃.

Free Cresol: 0.02% max.

Moisture: 0.1% max

Incandesced residue: 0.01% max.

Sulfate (as SO₄): 20ppm max.

Heavy metal (as Pb): 4ppm max.

As: 1ppm max.