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Name: Cobalt Sulfate
Chemical Formula: CoSO4 • xH2O
Common Synonyms: Sulphuric acid, cobalt(2+) salt
Appearance: Bright pink to red crystals or granular powder
Uses: Battery manufacturing, electroplating, pigments, animal feed, fertilizer
Odor: Essentially odorless
Classified Hazards: Toxic if swallowed, harmful if inhaled, irritant to skin and eyes
Carcinogenicity: Noted carcinogen with links to increased cancer risk upon ingestion or long-term inhalation
Target Organs: Respiratory tract, skin, eyes, cardiovascular system
Warning Signs: Notable warning coloring on labels — chronic exposure marked as hazardous for lungs
Active Ingredient: Cobalt(II) sulfate (approx. 97–99%)
Trace Impurities: Minor levels of cobalt oxides, moisture, metal salts
CAS Number: 10124-43-3
Inhalation: Remove affected person to fresh air, avoid further exposure, seek medical attention if symptoms persist
Ingestion: Rinse mouth, do not induce vomiting, seek immediate medical advice
Skin Contact: Remove contaminated clothing, rinse skin with running water for at least fifteen minutes, use soap
Eye Contact: Rinse with water for at least fifteen minutes, hold eyelids apart to ensure washing of entire surface
Medical Attention: Medical practitioners will watch for systemic toxicity, kidney, and respiratory symptoms
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide
Specific Hazards: Heated Cobalt Sulfate can release sulfur oxides which harm lungs and corrode tissue
Protective Equipment: Firefighters should wear self-contained breathing apparatus and chemical-resistant suits
Combustion Products: Toxic metal fumes and sulfur dioxide may result from fire
Personal Precautions: Keep away from dust, wear gloves, goggles, particle mask, ventilate area
Spill Cleanup: Use damp cloths, pick up without generating dust, place in sealed containers
Environmental Protection: Prevent runoff into sewers, waterways, soil
Decontamination: Wash hands and exposed skin thoroughly after handling spills
Handling: Handle in well-ventilated areas, avoid direct contact, minimize dust formation, keep containers tightly sealed
Safe Storage: Store in dry, cool, locked chemical cabinets with clear hazard labeling
Incompatibilities: Do not store near reactive metals, strong acids, or bases
General Hygiene: Don’t eat, drink, or smoke while handling cobalt compounds
Exposure Limits: Threshold limit values are strict due to carcinogenic potential and toxicity (OSHA and ACGIH recommended levels are low, often below 0.02 mg/m³ for workplace air)
Engineering Controls: Ventilated enclosures, local exhaust systems, minimize airborne particles
Personal Protective Equipment: Gloves (nitrile or butyl), safety goggles, dust masks or respirators (NIOSH-approved), protective clothing covering all exposed skin
Work Practices: Wash hands and face thoroughly after exposure, never touch face or unprotected skin during use
Physical State: Solid crystalline
Color: Pink to reddish
Odor: No strong odor noted
Solubility: Soluble in water, more so with warm temperatures
Melting Point: Decomposes before melting at higher temperatures
Vapor Pressure: Very low, not volatile
Density: About 2.0 g/cm³ (can vary based on hydration level)
Stability: Stable under recommended storage conditions, subject to degradation in moist environments
Hazardous Reactions: Can produce sulfur dioxide when heated or subjected to strong acids
Incompatible Materials: Strong oxidizers, reducing agents, certain acids and bases
Conditions to Avoid: Excessive heat, moisture, exposure to open flame, incompatible substances
Acute Toxicity: Harmful if swallowed, inhaled, or absorbed through skin
Chronic Effects: Cancer risk climbs with ongoing exposure, links to blood disorders and thyroid disruption
Irritation: Causes skin and eye irritation, may lead to dermatitis or conjunctivitis
Sensitization: Repeated contact may trigger allergic reactions in some people
Long-term Exposure: Increases risk for lung disease, respiratory failure, and organ toxicity
Aquatic Toxicity: Highly toxic to aquatic organisms, risk of bioaccumulation in fish tissue
Persistence: Slow breakdown, cobalt ions linger in waterways and soils
Environmental Mobility: Cobalt sulfate dissolves in water and migrates quickly in the environment, impacting both aquatic and terrestrial areas
Soil Effects: Uptake by plants can disrupt local ecosystems, may interfere with soil-dwelling organisms
Waste Management: Collect in sealed, clearly labeled hazardous waste containers
Disposal: Use government-approved hazardous waste contractors for final destruction, avoid landfill disposal
Spill Debris: Clean with care, keeping all materials contained and secured for transport
Community Responsibility: Take extra care near water bodies or public areas to prevent environmental release
Shipping Classification: Classed as hazardous for transport, strong labeling for toxicity and environmental danger
Packing Requirements: Use sealed, corrosion-proof containers; secondary containment helps prevent leaks
Accident Response: Emergency responders should have respirators and protective clothing ready for potential spills or exposure
Transit Restrictions: Some jurisdictions require permits due to risks of cobalt compounds
OSHA Listing: Cobalt compounds appear on occupational carcinogen lists with restricted airborne limits
Globally Harmonized System (GHS): Classified as carcinogenic, toxic, and environmentally hazardous
Environmental Regulations: Strict limits on wastewater, air emissions; reporting required under certain releases
Product Labeling: Must carry hazard pictograms, signal words, and precautionary statements for worker safety
