Tramadol is an opioid pain medication used to treat moderate to moderately severe pain. Tramadol powder is used primarily to treat mild to severe pain, both acute and chronic. Its analgesic effects take about one hour to come into effect and 2 to 4 h to peak after oral administration with an immediate-release formulation. Cas No: Formula: C16H25NO2 IUPAC: 2-[(Dimethylamino)methyl]-1-(3-methoxyphenyl)cyclohexanol Appearance: White powder Purity: 98.9%