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Product Name: Cerium Metal (Immersed in Kerosene)
Chemical Formula: Ce
CAS Number: 7440-45-1
Synonyms: Rare Earth Metal Cerium, Cerium In Mineral Oil
Recommended Use: Laboratory reagent, alloy production, special chemical syntheses
Manufacturer: Main producers of rare earth elements
Contact: Safety manager or local distributor
Emergency Contact: Local poison control or chemical safety authority
Physical State: Solid, silvery-gray metal pieces, suspended in transparent hydrocarbon oil
Main Hazards: Flammable metal; produces hydrogen on contact with water; may produce flammable gas on reaction with acids; fine powder ignites spontaneously when dry
Health Hazards: May cause skin and eye irritation; inhalation of fine particles can irritate respiratory tract
Environmental Hazards: Harmful to aquatic life if released
GHS Labels: Flame, Exclamation Mark
Cerium Content: 95-100% by weight
Chemical Symbol: Ce
CAS Number (Metal): 7440-45-1
CAS Number (Kerosene): 8008-20-6
Kerosene Content: Up to 10% as immersion medium
Impurities: Rare earth metal traces, no significant classification hazards
Inhalation: Move exposed individual to fresh air; assist breathing if needed
Skin Contact: Remove contaminated clothing; wash with water and mild soap; consult medical care for persistent irritation
Eye Contact: Flush eyes with plenty of water; avoid rubbing; seek medical advice if burning persists
Ingestion: Rinse mouth; do not induce vomiting; seek medical attention
Special Notes: Kerosene fumes aggravate symptoms, especially indoors
Suitable Extinguishing Media: Dry sand, Class D fire extinguisher
Unsuitable Extinguishing Media: Water, CO₂, foam (releases hydrogen, possible explosion)
Fire and Explosion Hazards: Cerium burns easily when dry; produces toxic and irritating smoke
Protective Equipment: Full face shield, flame-resistant suit, self-contained breathing apparatus
Special Procedures: Prevent water contact; isolate area, evacuate if fire spreads
Personal Precautions: Wear gloves, goggles, flame-resistant clothing
Environmental Precautions: Block discharge into drains, soil, or waterways
Clean-Up Methods: Collect spilled metal by hand or brush; use dry material for absorption of kerosene spills; place recovered material in airtight container under kerosene
Handling: Avoid skin contact; limit dust generation; keep away from moisture and oxidizers; use only in areas with effective exhaust ventilation
Storage: Store in original airtight containers filled with kerosene, away from ignition sources; keep containers tightly closed in dry, cool, well-ventilated room separated from acids and halogens
Specific Restrictions: No smoking, eating, or drinking near material
Engineering Controls: Local exhaust ventilation; explosion-proof electrical equipment
Personal Protection: Chemical-resistant gloves (nitrile or rubber); safety goggles; flame-retardant lab coat; dust mask or P2/P3 respirator for fine powders
Hygiene Measures: Wash hands after handling; remove contaminated clothing
Appearance: Gray, metallic solid pieces in clear pale yellow liquid
Odor: Mild petroleum smell from kerosene
Melting Point: 795 °C (1463 °F) for cerium
Boiling Point: 3443 °C (6228 °F) for cerium
Density: 6.77 g/cm³
Solubility: Insoluble in water; reacts with water
Flammability: Flammable solid; flammable liquid carrier
Molecular Weight: 140.12 g/mol
Vapor Pressure: Negligible for metal; low for kerosene at ambient
Chemical Stability: Stable under kerosene; oxidizes rapidly in air when dry
Reactive With: Water, acids, oxidizers, halogens, air (on prolonged exposure)
Decomposition Products: Hydrogen gas (with water); cerium oxide fumes (on combustion)
Conditions to Avoid: Exposure to open air, moisture, and strong acids
Routes of Exposure: Inhalation, skin contact, eye contact
Acute Effects: Skin or eye irritation on contact; inhalation may irritate respiratory tract
Chronic Effects: Prolonged exposure to fine cerium particles may affect lungs
Toxicity Data: LD₅₀ values not well established for humans; animal studies indicate low toxicity
Sensitization: No known allergenic properties
Ecotoxicity: Cerium compounds may stress aquatic organisms
Persistence: Cerium does not degrade; accumulates in soil and sediment
Mobility: Insoluble in water; settles in environment; kerosene may spread in groundwater
Bioaccumulation: Minimal data available; not expected to biomagnify significantly
Disposal Methods: Recycle or return unused metal to supplier; treat waste as hazardous chemical; do not discharge to sewers or drains
Packaging: Place waste material inside sealed metal drums filled with kerosene
Local Regulations: Follow national, regional, and local waste disposal guidance for metals and flammable liquids
UN Number: 1325 (Pyrophoric Metal, n.o.s.)
Transport Hazard Class: 4.2 (Spontaneously Combustible)
Packing Group: II
Shipping Name: Cerium Metal, Pyrophoric, Under Kerosene
Label: Spontaneously Combustible; Flammable Liquid (from carrier)
Special Precautions: Keep containers upright; prevent jolting; avoid contact with moisture during transit; keep away from food or animal feed
Global Inventories: Listed on TSCA, EINECS, and related chemical registries
Regulatory Classifications: Flammable solid; pyrophoric material
Labeling Requirements: Handle according to chemical hygiene protocols; display hazard labels as required
Workplace Restrictions: Observe OSHA/NIOSH exposure guidelines; refer to local health and safety authorities for additional requirements
