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Name: Manganese Chloride Tetrahydrate
Chemical Formula: MnCl2 · 4H2O
Common Appearance: Pink, crystalline solid
Chemical Family: Inorganic transition metal halide
Typical Uses: Research labs, chemical synthesis, manufacturing of batteries, dyes, fertilizers, feed supplements
Health Risks: Irritation to eyes, skin, respiratory tract. Inhalation can trigger coughing, shortness of breath. Prolonged or repeated exposure affects nervous system.
Environmental Threats: Harmful to aquatic life in high concentrations. Soluble in water so runoff risk present.
Fire and Reactivity Concerns: Not flammable alone, but presence near combustible materials can create extra hazards.
Symbolic Warnings: Exclamation mark for irritation; environment symbol not always required but merits attention from a risk standpoint.
Main Component: Manganese chloride tetrahydrate
Chemical Identity: CAS number commonly referenced in literature as 13446-34-9
Concentration Range: Nearly 100% pure in reagent grade forms. No additives or stabilizers typically mixed.
Eye Contact: Rinse gently with clean water for several minutes. Remove contact lenses if safe to do so. Continue flushing if irritation persists.
Skin Contact: Wash with soap and water. Remove contaminated clothing. See a physician if redness or rash develops.
Inhalation: Move to fresh air. Keep person at rest. Seek medical attention if symptoms like persistent cough or chest pain emerge.
Ingestion: Rinse mouth repeatedly with water. Do not induce vomiting. Medical review is important to watch for systemic effects.
Suitable Extinguishing Agents: Use water spray, dry chemical, foam, or CO2—the fire itself often involves packaging, not manganese chloride.
Personal Protection: Firefighters suit up with self-contained breathing apparatus. Fumes may include hydrogen chloride.
Special Hazards: Heated material decomposes to emit toxic gases, including chlorine and hydrogen chloride. Avoid inhalation of any smoke.
Spill Response: Wear gloves, goggles, and face protection. Scoop up crystalline material with non-reactive tools. Rinse area with plenty of water to ensure removal.
Environmental Actions: Prevent runoff to drains and waterways since manganese is toxic to aquatic organisms in excess. Collect any contaminated soil where persistence threatens.
Ventilation: Keep spaces well-ventilated during cleanup. Fume extraction helps when working in tight lab rooms.
Handling: Keep containers tightly sealed. Avoid generating dust or breathing dust during weighing or mixing. Work in chemical fume hood whenever possible.
Storage: Store in cool, dry, and well-ventilated area. Containers made of glass or corrosion-resistant plastics perform better for long-term storage. Keep away from food and drink to prevent accidental exposure.
Ventilation: Use local exhaust, with fume hoods ideal for repetitive or large-scale use.
Personal Protective Equipment: Chemical-resistant gloves, safety goggles, laboratory coat. Respirator recommended in settings with dust or airborne risk.
Hygiene Measures: Wash hands before eating or drinking. Shower after finishing lab tasks involving bulk material.
Occupational Limits: Workplace manganese exposure limits referenced by OSHA or ACGIH—strict monitoring needed in industrial settings.
Form: Crystalline solid
Color: Pale pink to rose-red
Odor: Virtually odorless
Solubility: Dissolves easily in water, forming a slightly acidic solution.
Melting Point: Loses water and decomposes before true melting
Density: Slightly heavier than water.
Chemical Stability: Stable at room temperature if kept dry. Absorbs water vapor from air, so desiccators prolong shelf life.
Incompatible Materials: Strong oxidizers, acids, cyanides—each can react to produce toxic or flammable gases.
Decomposition: Overheating leads to loss of hydration and production of hydrogen chloride fumes.
Potential Hazards: Not explosive or self-reactive. Problematic only with poor storage or accidental mixing with strong reactants.
Routes of Exposure: Inhalation, skin, eyes, ingestion
Symptoms: Headache, fatigue, nervous system effects after ongoing or repeated exposure. Elevated manganese can disrupt neurological balance.
Acute Effects: Immediate skin or respiratory irritation.
Chronic Effects: Manganese build-up affects mental performance in extreme long-term cases. Some research links high exposure to symptoms similar to Parkinson’s disease.
Aquatic Toxicity: Significant to fish and aquatic invertebrates when concentrations rise.
Persistence and Degradability: Inorganic—does not biodegrade. Risk of bioaccumulation in local food chains needs monitoring downstream from industrial sites.
Soil Mobility: Moves with water flow; not chemically bound in most soils.
Environmental Precautions: Keep waste and runoff contained. Dilution in municipal treatment often insufficient for large-scale discharges.
Waste Treatment: Dispose as hazardous chemical waste. Do not pour into drains or trash.
Recycling: On-site neutralization possible but requires skill and protective measures.
Landfill Disposal: Only in lined, regulated facilities. Keeping heavy metals away from leach fields protects groundwater.
Best Practices: Follow all local waste disposal laws. Coordinate with licensed waste handlers for regular pickups.
Packaging: Solid, tightly sealed in moisture-resistant containers.
Labeling: Clearly identified with proper hazard symbols under transport rules.
Regulated Status: Subject to transport regulations for hazardous substances—extra care in vehicle loading, spill prevention, and documentation remains essential.
Precautionary Steps: Keep away from acids, combustibles during transit. Immediate cleaning in event of rupture reduces roadside risk.
Workplace Laws: Covered by occupational exposure limits set by safety agencies such as OSHA and the European Chemicals Agency.
Environmental Controls: Monitored under wastewater and emissions regulations in developed areas. Facilities producing or using it submit regular reports, with surprise audits not uncommon.
Consumer Restrictions: Not used in household goods or direct food additives, but remains closely regulated in commercial supply chains.
