One synthesis of<unk>  from codeine<unk>  has a molecular weight of 271.35 g/mol and three salts are known: hydrobromide (as in the original Permonid brand; free-base conversion ratio 0.770), hydrochloride (0.881) and sulfate (0.802). Its freebase form is slightly soluble in water (1.425 g/L at 25 °C), although its salts are very water-soluble; its freebase form is also very soluble in most polar organic solvents (like acetone, ethanol and ethyl acetate). Its melting point is 189 °C. It has a pKa of 9.69.<unk>  comes in four isoforms, A, B, C, and D and the latter two appear to be the more researched and used. Krokodil is made from codeine mixed with other substances. The codeine is retrieved from over-the-counter medicine and is then mixed with ethanol, gasoline, red phosphorus, iodine, hydrochloric acid and paint thinner. Toxic nitrogen oxide fumes emerge from the drug when heated.
Desomorphine
Apomorphine
Droperidol
Tripelennamine
Bocasan
Benzatropine
Bretylium
Tropisetron