... to greyish-white or yellowish-white, fine crystalline powder Standard: BP2007,USP30,EP5Appearance: White to greyish-white or yellowish-white, fine ... Deg. (USP30) +18.50 Deg. to +20.50 Deg. (BP2007,EP5)Chloride: 100ppm max (BP2007,EP5)Loss on drying: 0.50% max ... (BP2007,EP5)Sulphated ash: 0.10% max (BP2007,EP5)Assay: 97.00-103.00% (USP30) 98 ...