We are offering promethazine hydrochloridemolecular formula: c17h20n2shclmolecular weight: 320.88physicochemical properties:assay: 99% minappearance: white crystalline powdermelting point: 222.5 c - (11 torr)ph: 4.1flash point: >110use: used to treat allergic conditions, travel sickness and sleeping difficulties. package: 25kgs net paper drumstandards:cas: 58-33-3bp2000cp2000usp25notes: the color, particle size or other physical properties of our products could be adjusted for your requirements.