Basic copper carbonate normally refers to the compound (Cu2(OH)2CO3) (the mineral malachite). Sometimes the name is used for Cu3(OH)2(CO3)2 (the related mineral azurite). Malachite and azurite can be found in the verdigris patina that is found on weathered brass, bronze, and copper. The composition of the patina can vary, in a maritime environment depending on the environment a basic chloride may be present, in an urban environment basic sulfates may be present.

Used as pigments
Used in types of make-up

Minimum Assay: >95%
Molecular Formula: CuCO3.Cu(OH)2
Molecular Weight: 221.10
Solubility in water (% weight): Insoluble in water
Melting Point: 200°C
Copper (Cu): 53-55%
Chloride (Cl): <0.05%
Sulphate (SO4): <0.05%
Insoluble in H2SO4: <0.05%

Hazard Class: 9

Packing Group: 3

Hazard Phrases: Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Prec Phrases: Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. Store locked up.



Cas No: 12069-69-1
Einecs No: 235-113-6
UN3077