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Name: Copper(II) oxide
Chemical formula: CuO
Physical state: Dry, black to brownish-black powder, odorless
Main usage: In ceramics, pigments, chemical synthesis, batteries, agricultural chemistry, and catalysis processes
CAS number: 1317-38-0
Hazard class: Irritant, toxic when inhaled or ingested
Main risks: Harm to respiratory system, damage to gastrointestinal tract, skin and eye irritation, risk to reproductive health
Warning symbols: Acute toxicity, environmental hazard
Possible impact: Prolonged or repeated exposure may cause serious health effects, including metal fume fever and liver or kidney damage in high concentrations
Routes of exposure: Inhalation, skin contact, ingestion, eye contact
Chemical: Copper(II) oxide
Purity: Commonly over 99% pure in laboratory or industrial settings
Impurities: May include trace metal contaminants, but usually present in low amounts
Inhalation: Remove person to fresh air, support breathing, monitor for persistent coughing or chest pain
Skin contact: Remove contaminated clothing, rinse skin with plenty of water, wash area with soap, check for lingering symptoms like redness or rash
Eye contact: Rinse eyes with water for several minutes while holding eyelids open, seek further help if irritation stays
Ingestion: Rinse mouth with water, seek quick medical care, avoid inducing vomiting without guidance
Long-term effects: Watch for headache, weakness, or nausea as signs of copper toxicity; get professional evaluation for persistent symptoms
Suitable extinguishing media: Use water spray, foam, dry powder, or carbon dioxide based on surrounding fire
Specific risk: Product itself does not catch fire easily, but in fire settings, toxic copper fumes may form
Protective equipment: Wear self-contained breathing apparatus and protective clothing to keep fumes off skin and out of lungs
Special info: Avoid spreading powder during suppression, because particulates become airborne
Personal precaution: Wear dust masks, gloves, goggles, reduce skin and lung contact
Environmental steps: Prevent from entering drains, sewers, waterways by using barriers or containment
Clean-up practices: Scoop up spilled powder with minimal dust, shovels or HEPA-filter vacuums work best, store waste in sealed containers
Decontamination: Clean affected surfaces with plenty of water, monitor for copper traces in nearby soil or drains
Handling: Work in ventilated spaces, wear proper gear, avoid making dust, never eat, drink, or smoke while handling
Storage: Keep containers tightly closed and clearly labeled, store away from acids and food products, choose dry, cool areas to avoid moisture-related clumping or reactions
Incompatibilities: Avoid contact with strong acids, reducing agents, and some organic materials; copper(II) oxide reacts to form toxic gases
Engineering controls: Fume hoods, local exhaust ventilation, dust collection systems limit airborne powder
Body protection: Disposable gloves, lab coat, chemical splash goggles, possibly a dust respirator with P100 rating for heavy-duty work or cleanup
Workplace practices: Wash hands before breaks, keep contaminated gear separate, shower after contact-intensive tasks, follow good hygiene standards
Limit values: Occupational exposure guidelines from agencies like OSHA and ACGIH cap copper dust exposure to prevent chronic symptoms
Appearance: Black or brown-black, fine powder or crystalline solid
Odor: Odorless
Melting point: About 1326°C (2419°F)
Solubility: Insoluble in water, but reacts slowly with strong acids
Density: About 6.3 g/cm³
Vapor pressure: Negligible at normal conditions
Other properties: Tends not to combust or emit vapors, stable under ordinary temperatures and pressures
Chemical stability: Stable in air at room temperature, does not decompose significantly over time
Reactive hazards: Contact with acids releases toxic copper salts and possibly dangerous gases, reacts with aluminum, magnesium, reducing agents
Decomposition products: Heated to high temps, may form copper fumes and trace oxides, both can be hazardous with repeated inhalation
General advice: Avoid unnecessary heating or mixing with incompatible chemicals for safe working
Acute effects: Inhaling dust triggers cough, throat pain, shortness of breath, symptoms can escalate to metal fume fever or nausea
Chronic risks: Repetitive, long-term exposure damages organs, causes anemia, liver and kidney strain, disrupts immune function
Skin/eye: Direct contact irritates, may cause redness, itching, and at higher concentrations, rashes or burns
Ingestion: Nausea, vomiting, abdominal pain, diarrhea, above-threshold copper doses from ingestion endanger GI tract and may cause systemic toxicity
Environmental persistence: Copper oxides linger in soil and water, raising copper ion levels
Effect on wildlife: Toxic to aquatic life, especially fish and invertebrates, copper disrupts normal enzyme functions
Soil and plants: Overuse as a fungicide or spill contamination changes microbial activity, stunts some crops, harms soil health
Bioaccumulation: Copper builds up in animal tissues, impacts food chains over time
Waste management: Collect and label waste as hazardous, never dispose of via household garbage or down drains
Treatment: Specialized facilities treat copper-laden material, prevent entry to regular landfill
Reuse/recycle: Recovery possible in industrial settings, though less common in small labs
Regulatory oversight: Follow local and national rules on disposal of copper compounds to keep community and environment protected
Shipping label: Identify as toxic inorganic material if transporting in bulk
Handling during transit: Secure containers to prevent tipping or breakage, use sealed bags/boxes to stop leaks
Special documentation: Carriers may require safety data and emergency instructions
Accident risk: Risk of environmental harm if released in transit, so careful handling and emergency preparedness make a big difference
Workplace safety: Most industrial guidelines set strict limits for permissible exposure, regular health monitoring supports workers
Hazard symbol regulations: International standards label copper(II) oxide with environmental and toxicity warnings
Environmental rules: Agencies track copper waste, spills, and emissions, penalties for exceeding discharge limits
Consumer protections: Not for food or cosmetic use, labeled accordingly to prevent accidental misuse
