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Name: Manganese carbonate

Synonyms: Manganese(II) carbonate

Molecular Formula:MnCO3

Molecular Weight:114.95

CAS Registry Number: 598-62-9

EINECS:209-942-9

Manganese carbonate is a compound with the chemical formula MnCO3. Manganese carbonate occurs naturally as the mineral rhodochrosite. Approximately 20,000 metric tonnes were produced in 2005. Treatment of aqueous solutions of manganese(II) salts with alkali metal carbonates leads to precipitation of this faintly pink solid. The carbonate is insoluble in water but, like most carbonates, hydrolyses upon treatment with acids to give water-soluble salts. Manganese carbonate is widely used as an additive to plant fertilizers to cure manganese deficient crops. It is also used in health foods, in ceramics as a glaze colorant and flux, and in concrete stains. Manganese is essential for aerobic life and its compounds are not highly toxic. Manganese poisoning, also known as manganism, may be caused by long-term exposure to manganese dust or fumes.
Use:
Materials for electromagnet ferrite, ceramic glaze; feedstuffs additive; also used as micronutrient fertilizer.
Specifications:
1, Soft magnetis
Index items(based on dry basis)                                                                              Index( %)
Type Type Type
Top quality First quality First quality Qualified products
Content(based on Mn) 44.0~46.0 ≥43.0~46.0
Chloride(based on Cl) 0.01 0.01 0.01 0.02 0.03
Sulphate(based on SO4) 0.05 0.03 0.03 0.03 0.05
Silicon dioxide(SiO2) 0.01 0.01 0.02 0.02 0.05
Aluminium(Al)≤ 0.01 0.01 0.02 0.02 0.05
Potassium(K)≤ 0.01 0.01 0.01 0.01 0.02
Sodium(Na)≤ 0.02 0.02 0.02 0.02 0.03
Calcium(Ca)≤ 0.03 0.03 0.09 0.30 1.0
Magnesium(Mg)≤ 0.02 0.02 0.05 0.10 0.50
Lead(Pb)≤ 0.01 0.005 0.01 0.01 0.02
Residue through 45μm screen 1.0 3.0 3.0 - -

2, Technical grade

Index items(based on dry basis)                  Index(%)
First quality Second quality
Content(based on Mn≥ 44 43.0
Sulphate(based on SO4)≤ 0.7 1.0
Chloride(based on Cl)≤ 0.03 0.1
Granularity, Residue through 45μm screen 4.0 6.0

3, Feedstuff grade

Index items(based on dry basis) Index(% )
Content(based on Mn)≥ 43.5
Sulphate(based on SO4)≤ 0.7
Chloride(based on Cl)≤ 0.03
Heavy metal(based on Pb)≤ 0.002
Cadmium?(based on Cd)≤ 0.0005
Arsenic(As)≤ 0.0005
Insoluble substance in (HNO3)≤ 0.03
Fluoride(F) ≤ 0.01

Packing: In PP woven bag lined with with PE plastic bag. N.W.:25kg per bag.