Manganese Acetate Material Safety Data Sheet (MSDS)
Identification
Chemical Name: Manganese(II) acetate tetrahydrate
Synonyms: Manganese diacetate, Acetic acid manganese(2+) salt, Manganese acetate
CAS Number: 6156-78-1
EC Number: 204-656-8
Recommended Use: Catalyst for chemical reactions, laboratory reagent, pigment production, textile dyeing
Manufacturer/Supplier: Laboratory and industrial chemical suppliers
Contact Information: Refer to product label for current manufacturer address and emergency number
Hazard Identification
Classification: Classified under GHS as Acute Toxicity Oral Category 4, Eye Irritation Category 2A, Specific Target Organ Toxicity (Repeated Exposure) Category 2
Label Elements: Warning symbol, exclamation mark
Hazard Statements: Harmful if swallowed, causes serious eye irritation, may cause damage to central nervous system through prolonged or repeated exposure
Precautionary Statements: Wash skin thoroughly after handling, avoid breathing dust, do not eat, drink, or smoke while using this product, wear protective gloves and eye protection
Composition / Information on Ingredients
Substance: Manganese(II) acetate tetrahydrate
Formula: Mn(CH3COO)2·4H2O
Concentration: 98–100% (as the major component)
Hazardous Components: No significant impurities classified as hazardous according to available information
Molecular Weight: 245.09 g/mol
First Aid Measures
Inhalation: Move to fresh air. Seek medical attention if symptoms develop or persist, such as headache, dizziness, or respiratory discomfort.
Skin Contact: Remove contaminated clothing. Rinse skin with water for several minutes. If irritation or pain remains, get medical attention.
Eye Contact: Rinse cautiously with water for at least 15 minutes. Hold eyelids apart. Get medical help if irritation lingers.
Ingestion: Rinse mouth thoroughly. Do not induce vomiting unless directed by medical personnel. Give water to drink if the person is conscious. Seek immediate medical care.
Symptoms: May include gastrointestinal pain, coughing, headache, eye redness, nausea, or delayed nervous system symptoms in severe cases
Fire-Fighting Measures
Suitable Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or foam to extinguish.
Specific Hazards: Generates toxic manganese oxides and acetic acid vapors when heated or combusted.
Protective Equipment for Firefighters: Wear full protective gear including self-contained breathing apparatus.
Special Procedures: Avoid inhalation of vapors or decomposition products. Cool containers exposed to flames with water.
Explosion Data: Manganese acetate is not classified as an explosive substance, but fine powders can present a minor dust hazard in rare cases.
Accidental Release Measures
Personal Precautions: Put on appropriate personal protective equipment. Avoid breathing dust, ventilate area.
Environmental Precautions: Prevent spillage from entering drains or waterways to reduce risk of toxic effects to aquatic life.
Clean-up Methods: Sweep up and collect material using non-sparking tools. Place in labeled, closed container for disposal. Wash spill area with plenty of water.
Large Spills: Use vacuum or wet sweeping methods to avoid dust formation. Notify appropriate regulatory authorities if release contaminates waterways.
Handling and Storage
Handling: Use with adequate ventilation, avoid contact with skin, eyes, and clothing. Do not breathe dust. Wear protective gloves, goggles, and lab coat.
Storage: Store in tightly closed containers in cool, dry, well-ventilated place. Keep away from incompatible substances like oxidizing agents and acids.
Storage Conditions: Protect from moisture, keep container upright to avoid leaks.
Hygiene Practices: Wash hands thoroughly after use, do not eat or smoke in designated storage areas, keep containers clearly labeled.
Exposure Controls and Personal Protection
Exposure Limits: OSHA PEL for manganese compounds as Mn: 5 mg/m3 Ceiling, ACGIH TLV: 0.02 mg/m3 inhalable, 0.1 mg/m3 respirable
Engineering Controls: Provide local exhaust or general ventilation to minimize airborne concentrations.
Personal Protection: Wear chemical-resistant gloves (such as nitrile), tightly fitting safety goggles, laboratory coats or aprons.
Respiratory Protection: Use NIOSH-approved particulate respirators if dust is generated or ventilation is inadequate.
Other Protection: Eyewash stations and safety showers should be available in areas of use or handling.
Physical and Chemical Properties
Appearance: Pink solid, crystalline powder
Odor: Slight acetic acid odor
Odor Threshold: Not available
pH: Slightly acidic in aqueous solution
Melting Point: 80°C (decomposes)
Boiling Point: Decomposes before boiling
Solubility: Readily soluble in water and alcohol
Vapor Pressure: Not applicable (non-volatile)
Relative Density: About 1.59 g/cm3
Partition Coefficient (n-octanol/water): Not determined
Evaporation Rate: Not applicable for solid
Flash Point: Not flammable
Autoignition Temperature: Not determined
Viscosity: Not applicable
Stability and Reactivity
Chemical Stability: Stable under normal temperatures and recommended storage conditions
Reactivity: Reacts with strong oxidizers, acids
Hazardous Reactions: Contact with strong acids liberates acetic acid fumes
Decomposition Products: Manganese oxides and acetic acid fumes when heated or burned
Polymerization: Product does not undergo hazardous polymerization
Toxicological Information
Likely Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Toxicity: Oral LD50 (rat): approximately 1960 mg/kg
Skin and Eye Irritation: Causes moderate irritation and redness on contact
Chronic Effects: Prolonged or repeated exposure may affect the central nervous system, potentially leading to symptoms like tremors, memory loss, mood changes, or difficulty walking
Carcinogenicity: IARC, NTP, and OSHA do not classify manganese acetate as a carcinogen
Mutagenicity/Reproductive Toxicity: No clear evidence of mutagenic or reproductive hazards reported under normal laboratory use
Ecological Information
Ecotoxicity: Harmful to aquatic organisms at higher concentrations, manganese compounds have potential for long-term adverse effects in aquatic systems
Persistence and Degradability: Inorganic compound, does not biodegrade but dilutes in water
Bioaccumulative Potential: Potential for moderate bioaccumulation in aquatic organisms if released in large quantities over extended periods
Mobility in Soil: Dissolves readily and may migrate in moist soils or watercourses
Other Adverse Effects: Can disrupt aquatic environments if released in uncontrolled amounts
Disposal Considerations
Waste Generation: Collect waste in sealed containers, avoid generating dust
Disposal Methods: Dispose of in accordance with local, regional, and national regulations for hazardous waste; incineration or landfill approved for manganese compounds
Container Handling: Rinse empty containers well; dispose of residues as hazardous waste
Precautions: Do not allow product or waste to enter sewer or surface waters
Transport Information
UN Number: Not regulated as a hazardous material by ground, sea, or air
Transport Hazard Class: Not classified as a dangerous good
Packing Group: Not assigned
Special Precautions for Transport: Keep containers securely closed and protected during transport to prevent spillage and exposure
Shipping Name: Manganese acetate
Regulatory Information
OSHA: Regulated under Hazard Communication Standard as a hazardous chemical
TSCA: Listed under Toxic Substances Control Act chemical inventory
SARA Title III: Subject to report under Section 313 as a manganese compound
REACH Registration: Registered in the EU for relevant uses
Other National Inventories: Listed in most major chemical inventories including Canada DSL, Australia AICS, Japan ENCS, Korea ECL
Labeling Requirements: Conforms to GHS and local safety regulations, including hazard pictograms and precautionary statements
