Manganese(II) carbonate

Synonyms

Carbonic acid, manganese(2+) salt (1:1); Manganese carbonate (1:1); Manganese carbonate (MnCO3); Manganese(2+) carbonate; Manganese(2+) carbonate (1:1); Manganous carbonate; Natural rhodochrosite; [ChemIDplus]

Category

Manganese Compounds, Inorganic

Description

Rose-colored crystals; [HSDB] Tarnishes to light brown; [Merck Index] Hygroscopic solid; Practically insoluble in water: 0.065 g/L @ 25 deg C; [MSDSonline]

Sources/Uses

Used as a pigment (manganese white), drier for varnishes, animal feed additive, welding rod ingredient, and to make other manganese salts and pharmaceuticals; [HSDB]

Comments

An irritant; Toxic if absorbed; [MSDSonline] See "Manganese" and linked occupational diseases.

Biomedical References

0.02 mg/m3, as Mn (respirable fraction), 0.1 mg/m3, as Mn (inhalable fraction)

Ceiling(OSHA)=5 mg/m3, as Mn

0.2 mg/m3, as Mn (inhalable fraction), 0.02 mg/m3, as Mn (respirable fraction)

Parkinsonism

Diseases

Occupational diseases associated with exposure to this agent:

• Manganese, chronic toxic effect

Processes

Industrial Processes with risk of exposure:

• Farming (Feed Additives)
• Painting (Pigments, Binders, and Biocides)
• Welding