Cupric carbonate basic extra pure

Cupric carbonate basic extra pure is a high-purity form of basic copper(II) carbonate (Cu₂CO₃(OH)₂ or CuCO₃·Cu(OH)₂), appearing as a green to dark green amorphous powder, insoluble in water but soluble in acids.​

Identity and Composition

Chemical name: Basic cupric carbonate; copper carbonate hydroxide.​

Molecular formula: Cu₂CO₃(OH)₂; molecular weight 221.11 g/mol.​

Grade specifications: Extra pure with Cu content 46–50%, low impurities (e.g., chlorides ≤0.05%, sulfates ≤0.5%, Fe ≤0.1%).​

Physical Properties

Appearance: Green powder (peacock green or dark green).​

Density: ~3.9 g/cm³.​

Decomposition: Loses water at ~200 °C, decomposes to CuO + CO₂ + H₂O at 290 °C.​

Solubility: Insoluble in water/alcohol; soluble in acids, ammonia, cyanide, or alkali carbonates forming copper complexes.​

Typical Uses

Extra pure basic cupric carbonate is used as a pigment (e.g., in paints, enamels), pyrotechnics/signal flares, fungicide/algaecide, precursor for other copper salts, and in plating or phosphor activators.​

Handling and Safety

Hygroscopic and toxic (inhalation/skin absorption); harmful to aquatic life. Store sealed in dry conditions; avoid environmental release and use PPE.​

For catalog purposes: “Cupric carbonate basic extra pure, Cu₂CO₃(OH)₂, green powder, Cu 46–50%, insoluble in water, decomposes 200–290 °C, pigment/fungicide; toxic to aquatic life.”​