Cupric sulphate Anhydrois

Cupric sulphate anhydrous (CuSO₄) is a white, greyish-white, or pale green crystalline powder, highly hygroscopic and serving as a weak oxidizing agent that readily absorbs water to form the blue pentahydrate.​

Identity and Composition

Chemical name: Copper(II) sulfate anhydrous.​

Molecular formula: CuSO₄; molecular weight 159.61 g/mol.​

Crystal structure: Orthorhombic.​

Physical Properties

Appearance: White to greyish powder (distinguishes from blue pentahydrate).​

Density: 3.6 g/cm³.​

Melting/decomposition: Decomposes above 560–650 °C to CuO and SO₃; highly soluble in water (e.g., 1.055 molal at 10 °C).​

Typical Uses

Employed as a desiccant (due to color change upon hydration), in analytical chemistry, electroplating, pigments, and as a reagent in organic synthesis or qualitative tests.​

Handling and Safety

Hygroscopic; store in airtight containers. Toxic if ingested, irritant to skin/eyes, and harmful to aquatic life; decomposes to toxic SOx fumes when heated.​

For catalog purposes: “Cupric sulphate anhydrous, CuSO₄, white orthorhombic powder, density 3.6 g/cm³, hygroscopic, decomposes >560 °C, water-soluble; for reagents and desiccants; toxic/ irritant.”​