Metformin Hydrochloride → HCID 178484382, compound

Participants

Reaction Conditions

Reaction Steps

500 g (1 molar equivalent) of metformin hydrochloride and 120.76 g (1 molar equivalent) of sodium hydroxide were stirred in 3750 ml of methanol at room temperature, after which the produced inorganic salt was filtered, and the filtrate was concentrated. The produced crystal was stirred in 5000 ml of acetone at 40° C., and then the produced inorganic salt was filtrated, and the filtrate was concentrated. The produced crystal was stirred in 4000 ml of acetone at 40° C., and then the produced crystal was filtrated, and the filtrate was concentrated, thus obtaining 233.3 g (yield: 59.84%) of metformin free-base.

Provenance & Evidence