CAS NO 7726-95-6 Molar mass 159.80 g/mol Sl. No Test Parameter Specification 1 Description Reddish-brown fuming liquid 2 Assay (as Br2) % by mass > 99.50 3 Chlorine ( as Cl-) % by mass < 0.20 % 4 Sulphates ( as SO4-) % by mass < 0.01 % 5 Iodine ( as I-) % by mass < 0.05 % 6 Non-volatile matter % by mass < 0.01 % 7 Moisture % by mass < 0.05 % 8 Relative Density at 25 C 3.10