Synthesis of copper(I) bromide

Preparation of copper(I) bromide (cuprous bromide)

Copper(I) bromide may be prepared by dissolving 150 grams of copper sulfate pentahydrate and 87.5 grams of sodium bromide dihydrate (NaBr · 2H2O) in 600 ml of warm water. To the obtained solution, 38 grams of powdered sodium sulfite are added over a period of 5-10 minutes while stirring. The reduction is not complete if the blue color is not completely discharged. In such case, a little more sodium sulfite should be added. The mixture is then cooled, the obtained precipitate of copper(I) bromide is collected by filtration, washed twice with water containing a little dissolved sulfurous acid, pressed with a glass stopper to remove most of the liquid, and finally dried at 100-120° C. The yield of copper(I) bromide is about 80 g.

A solution of copper(I) bromide may be prepared by dissolving the solid in hot constant boiling point hydrobromic acid. Additionally copper(I) bromide solution is prepared by refluxing a mixture of 20 grams of copper turnings, 63 grams of copper sulfate pentahydrate, 30 grams (or 16,3 ml) of concentrated sulfuric acid, 154 grams of sodium bromide dihydrate (NaBr · 2H2O) in 1 litre of water for 3-4 hours. If the color of the solution has not become yellowish after this period of heating, additionally, a few grams of sodium sulfite should be added to complete the reduction.

A text book of practical organic chemistry, by A. I. Vogel, 191, 1974





InChI Key


Canonical SMILES


Depositor-Supplied Synonyms

Copper(I) bromide, 7787-70-4, Copper bromide (CuBr), Bromocopper, copper(I)bromide, Copper monobromide, copper(1)bromide, Copper I Bromide, copper-(I)bromide, copper(1) bromide, copper (I) bromide, copper-(I) bromide, copper (1) bromide, copper-(1) bromide, copper- (I) bromide, AC1L2NJJ, AC1Q23SS, KSC378K9J, 02116_RIEDEL, 212865_ALDRICH, 254185_ALDRICH, HSDB 270, 61163_FLUKA, CTK2H8594, MolPort-001-783-709, NKNDPYCGAZPOFS-UHFFFAOYSA-M, 02116_SIAL, 61163_SIAL, 212865_SIAL, EINECS 232-131-6, ANW-54254, AKOS015833217, BP-21320, U019, RT-000435, FT-0624041, FT-0624122, I14-19753, 62431-55-4

Removed Synonyms

Copper bromide, CUPROUS BROMIDE, Copper(1+) bromide, CID24593, IN1539

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