Quick Search
Manganese Carbonate is an inorganic compound with the formula MnCO₃.
It appears as a pale pink to light brown powder and is primarily used in fertilizers, ceramics, and as a precursor to other manganese compounds.
CAS Number:
598-62-9
Synonyms:
Manganese(II) carbonate,Manganous carbonate,Carbonic acid, manganese(2+) salt (1:1), MnCO₃,Manganese carbonate
Introduction
Manganese carbonate (MnCO₃) is an inorganic compound that occurs naturally as the mineral rhodochrosite.
It appears as a pink to light brown solid and has been recognized for its multifaceted roles in metallurgy, ceramics, agriculture, and medicine.
Historically, rhodochrosite was first described in the late 18th century, with increasing industrial interest throughout the 20th century due to manganese's critical role in steel production and various other chemical processes.
MnCO₃ is both synthesized and mined, and its unique properties have led to widespread applications. This document aims to provide a comprehensive overview of the physical, chemical, industrial, and environmental aspects of manganese carbonate, as well as its safety profile and future prospects.
Chemical and Physical Properties
Manganese carbonate has the molecular formula MnCO₃ and a molar mass of approximately 114.95 g/mol. It crystallizes in the trigonal system and is isostructural with calcite (CaCO₃).
The manganese ion is present in the +2 oxidation state, coordinated with carbonate anions.
Color: Light pink to tan
Density: Approximately 3.12 g/cm³
Melting Point: Decomposes before melting
Solubility: Insoluble in water; soluble in acids with the release of carbon dioxide
pH: Slightly alkaline when suspended in water
Thermal Behavior: Upon heating, MnCO₃ decomposes to form manganese(II) oxide (MnO) and carbon dioxide (CO₂)
These characteristics make MnCO₃ a valuable intermediate in various chemical syntheses.
Methods of Synthesis and Production
Manganese carbonate is produced through various methods:
Laboratory Synthesis: Typically involves the reaction of manganese(II) salts (such as MnSO₄ or MnCl₂) with a soluble carbonate (e.g., Na₂CO₃ or (NH₄)₂CO₃).
The reaction results in the precipitation of MnCO₃ as a fine powder.
Industrial Production: Utilizes similar precipitation methods but on a larger scale.
In some cases, the mineral rhodochrosite is directly used, purified through leaching and filtration.
Hydrothermal Methods: Employed for producing high-purity MnCO₃ crystals with specific morphologies for research and industrial applications.
Raw materials used include manganese salts, carbon dioxide sources, and sometimes hydrothermal setups.
Analytical Methods for Characterization
To ensure product quality and research integrity, several analytical techniques are employed:
X-Ray Diffraction (XRD): Used to determine the crystalline structure and phase purity.
Fourier-Transform Infrared Spectroscopy (FTIR): Identifies functional groups and bonding characteristics.
Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC): Analyze thermal stability and decomposition temperatures.
Scanning Electron Microscopy (SEM): Examines surface morphology and particle size.
Inductively Coupled Plasma Mass Spectrometry (ICP-MS): Measures trace elemental composition with high sensitivity.
These methods collectively provide a detailed understanding of manganese carbonate's physical and chemical profile.
Applications in Industry
Manganese carbonate has a wide range of industrial applications:
Ceramics and Glass: Acts as a colorant and fluxing agent, imparting pinkish hues and modifying melting properties.
Pigments: Used in paints and coatings for corrosion resistance and aesthetic appeal.
Catalysts: Serves as a precursor to active manganese oxides used in oxidation-reduction reactions.
Agricultural Fertilizers: Supplies manganese as a micronutrient, essential for plant enzymatic functions.
Its chemical stability and compatibility with other components make it a preferred additive in various manufacturing processes.
Applications in Technology and Research
Beyond traditional industries, MnCO₃ is gaining attention in cutting-edge technologies:
Batteries: As a precursor for manganese dioxide (MnO₂), which is used in alkaline and lithium batteries.
Magnetic Materials: Explored in magnetic refrigeration and other advanced magnetic systems.
Sensors and Electronics: Incorporated into sensors for detecting gases and environmental monitoring.
Biomedical Applications: Studied for controlled drug release and imaging agents in cancer therapy.
These applications demonstrate the material's versatility and potential for innovation.
Biological Role and Nutritional Aspects
Manganese is a vital trace element involved in numerous biological functions:
Enzyme Activation: Mn is a cofactor for enzymes such as superoxide dismutase and arginase.
Bone Development: Essential for normal skeletal growth and maintenance.
Reproductive Health: Plays a role in hormone synthesis and reproductive health.
Manganese carbonate is used as a dietary supplement and in animal feed to correct deficiencies. Its bioavailability depends on particle size, formulation, and co-administered nutrients.
SAFETY INFORMATION ABOUT MANGANESE CARBONATE
First aid measures:
Description of first aid measures:
General advice:
Consult a physician.
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
If inhaled:
If breathed in, move person into fresh air.
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off contaminated clothing and shoes immediately.
Wash off with soap and plenty of water.
Consult a physician.
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
If swallowed:
Do NOT induce vomiting.
Never give anything by mouth to an unconscious person.
Rinse mouth with water.
Consult a physician.
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment.
Avoid breathing vapours, mist or gas.
Evacuate personnel to safe areas.
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste.
Keep in suitable, closed containers for disposal.
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place.
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles.
Faceshield (8-inch minimum).
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection:
Handle with gloves.
Gloves must be inspected prior to use.
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product.
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls.
If the respirator is the sole means of protection, use a full-face supplied air respirator.
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions.
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product
