Synthesis of copper sulfate

Preparation of copper sulfate

Preparation of copper sulfate

Preparation of copper sulfate

100 g of copper (small pieces, turnings, etc.) are added to 100 ml of concentrated sulfuric acid. The flask is heated and if necessary to complete the reaction additional 80 ml of sulfuric acid could be added (copper sulfate is obtained also from the residue remaining in the flask in the process of preparing sulfur dioxide).  This solution is treated with the additional portion of water (in order to fully dissolved copper sulfate), heated and filtered. The filtrate is allowed to crystallize and obtained copper sulfate as pentahydrate (CuSO4 · 5H2O) could be additionally purified by recrystallization from water.

Laboratory manual of inorganic preparations, by H. T. Vulte, 76, 1895

Preparation of copper sulfate from copper and diluted sulfuric acid

Alternatively copper sulfate could be prepared by treating copper with diluted sulfuric acid and using nitric acid instead of air as the oxidizing agent.

Preparation of copper sulfate from copper and diluted sulfuric acid

Preparation of copper sulfate from copper and diluted sulfuric acid

The copper turnings are heated in an iron pan until all oily matter is burned off and the metal has become coated with copper oxide. The ignited copper turnings are treated with the calculated volume of 6N sulfuric and 6N nitric acid. The reaction mixture is warmed in the hood for 20 minutes and if any metallic copper remains undissolved, is removed by decantation or filtration or is treated additionally with a few cubic centimeters of fresh nitric acid and twice as much sulfuric acid. If the solution is not perfectly clear, it is filtered while hot and cooled as rapidly as possible with stirring to obtain a crystal meal. The meal is separated from the mother liquor, by filtration, evaporated in order to obtain a second crop of crystals. Combined copper sulfate is purified by dissolving in warm water and placing the warm solution in the crystallizing dish. The crystallization process could be started by adding some seed crystals when the temperature is about 35° C. The nex day the crystals of copper sulfate are removed by filtration, and the filtrate is concentrated by evaporation yielding additional amount of crystals. Finally, the copper sulfate is dried and kept in the well stoppered bottle.

Synthetic inorganic chemistry, by A. A. Blanchard, 220-221, 1936





InChI Key


Canonical SMILES


MeSH Synonyms

Blue Vitriol, Copper Sulfate, Cupric Sulfate, Sulfate, Copper, Sulfate, Cupric, Vitriol, Blue

Depositor-Supplied Synonyms

Copper sulfate, CUPRIC SULFATE, Copper(II) sulfate, Copper sulphate, Copper(2+) sulfate, 7758-98-7, copper (II) sulfate, Copper(ii) sulfate, anhydrous, Hylinec, Trinagle, Cupric sulfate anhydrous, Delcup, Cupric sulphate, Blue stone, Copper monosulfate, Monocopper sulfate, Copper II sulfate, Incracide 10A, Incracide E 51, BCS copper fungicide, Blue copper (VAN), Bonide Root Destroyer, Copper Sulfate Powder, Kupfersulfat [German], Cupric sulfate standard, Copper sulfate (1:1), All Clear Root Destroyer, Copper sulfate, anhydrous, Copper sulfate (CuSO4), UNII-KUW2Q3U1VV, Snow Crystal Copper Sulfate, Sulfate de cuivre [French], Copper(II) sulfate solution, Sulfuric acid copper(2+) salt (1:1), Aqua Maid Permanent Algaecide, CCRIS 3665, HSDB 916, Copper (II) sulfate (1:1), Copper(2+) sulfate (1:1), Granular Crystals Copper Sulfate, MAC 570, Tobacco States Brand Copper Sulfate, EINECS 231-847-6, Phelps Triangle Brand Copper Sulfate, NSC 57630, Cupric sulfate solution acc. to Fehling, Sulfuric acid, copper(2+) salt (1:1), Sa-50 Brand Copper Sulfate Granular Crystals, Aquatronics Snail-A-Cide Dri-Pac Snail Powder, 18939-61-2, Fehling’s reagent I for sugars, Sulfuric acid, copper(2+) salt, kupfer(2+)sulfat, copper(II)sulphate, copper(II)-sulfate, copper(II) sulphate, CuSO4, Copper(2+) sulphate, CuSO4 copper sulphate, Copper (II) sulphate, Copper (11) sulfate, Chalcocyanite (mineral), Sulfuric acid, copper(2+) salt (1:?), Bluestone copper sulfate, Copper standard solution, Bluestone (pentahydrate), copper(2+) ion sulfate, KUW2Q3U1VV, ACMC-20d8h5, Sulfuric acid, copper salt, AC1L2NG9, AC1Q22KX, Blue vitriol (pentahydrate), C1297_SIGMA, Bonattite (trihydrate mineral), Copper(II) sulfate on alumina, 12852_RIEDEL, 35185_RIEDEL, 36018_RIEDEL, 451657_ALDRICH, Boothite (heptahydrate mineral), C1297_SIAL, C2284_SIAL, 03373_FLUKA, 35185_FLUKA, 36018_FLUKA, 46202_FLUKA, 61230_FLUKA, CHEBI:23414, ARUVKPQLZAKDPS-UHFFFAOYSA-L, MolPort-006-109-645, 12852_SIAL, 61230_SIAL, Chalcanthite (pentahydrate mineral), EINECS 242-692-9, AKOS015902901, LS-3187, RL04986, BP-20356, K358, AB1007622, C18713, Fehling inverted exclamation mark s reagent (A), 3B4-2497, I14-19713, I14-53029, Fehling inverted exclamation mark s reagent I for sugars, 10124-44-4, 139939-69-8

Removed Synonyms

Blue vitriol, Roman vitriol, Blue Copper, Kupfersulfat, Sulfate, Copper, Sulfate, Cupric, Vitriol, Blue, Sulfate de cuivre, Copper(II)sulfate, copper(2+), CID24462, Copper standard concentrate 10.00 g Cu, D019327, Copper atomic spectroscopy standard concentrate 10.00 g Cu, 7758-99-8

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