what is tramadol hcl
Tramadol hydrochloride is a centrally acting synthetic analgesic in an extended-release formulation. The chemical name is (Â±) cis-2-[(dimethylamino)methyl]Â­-1-(3-methoxyphenyl) cyclohexanol hydrochloride. Its structural formula is: The molecular weight of tramadol hydrochloride is 299.8. It is a white, bitter, crystalline and odorless powder that is readily soluble in water and ethanol and has a pKa of 9.41. The n-octanol/water log partition coefficient (logP) is 1.35 at pH 7.