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Product Name: Lanthanum(III) Oxide
Synonyms: Lanthanum oxide, La2O3
Chemical Formula: La2O3
CAS Number: 1312-81-8
Recommended Uses: Catalyst production, optical glass, electronics, ceramics manufacturing
Supplier Details: Manufacturer’s address and emergency contact information should always be available in the workplace where storage and use occur
Emergency Numbers: Local poison control and fire department
GHS Classification: Not classified as hazardous under most GHS systems
Hazard Statements: Dust generation causes respiratory irritation, eye discomfort, mild skin redness
Pictograms: Exclamation mark (respiratory irritation), environmental (long-term hazards in certain concentrations in water)
Signal Word: Warning
Routes of Entry: Inhalation, ingestion, eye or skin contact
Precautionary Statements: Avoid dust formation, use proper ventilation, wash hands after handling, wear proper eye and respiratory protection
Chemical Name: Lanthanum(III) Oxide
Percentage: Above 99% (typical industrial purity)
Impurities: Trace amounts of rare earth oxides (such as cerium, neodymium, praseodymium)
EC Number: 215-200-5
Molecular Weight: 325.81 g/mol
General Advice: Seek medical attention if symptoms persist after exposure
Inhalation: Move to fresh air, support breathing, rinse mouth, contact a health professional
Skin Contact: Remove contaminated clothing, wash affected area with soap and water, seek medical advice if irritation occurs
Eye Contact: Rinse eyes gently for 15 minutes with lukewarm, gently flowing water, remove contact lenses if present, keep eyelids open by hand, consult eye specialist for persistent pain
Ingestion: Rinse mouth, drink water if the person is alert, do not induce vomiting, seek medical attention for significant discomfort or symptoms
Suitable Extinguishing Media: Dry chemical, CO2, foam, water spray for larger fires, use water spray to cool fire-exposed containers
Unsuitable Methods: Avoid direct, high-pressure water to keep dust from airborne dispersion
Specific Hazards: Oxide dust may aggravate respiratory conditions, product itself is not flammable but releases hazardous dust when disturbed by flames
Protective Equipment for Firefighters: Wear self-contained breathing apparatus with full facepiece, chemical-resistant gloves and suit to avoid contact with product and smoke
Special Procedures: Remove containers from the fire zone if possible, avoid entering confined fire spaces without appropriate gear
Personal Precautions: Wear approved respirator, safety goggles, nitrile gloves
Environmental Precautions: Prevent entry to drains, watercourses, and soil, contain spill using inert material
Methods for Cleanup: Avoid dry sweeping to prevent dust cloud, use HEPA-filtered vacuum or dampen powder before shoveling into waste containers, secure containers tightly
Decontamination: Wash area with plenty of water, keep responders upwind if cleanup generates dust
Handling: Wear protective clothing, use local exhaust ventilation, minimize dust exposure, wash hands before eating and after handling
Storage: Store in tightly closed containers, cool and dry storage room, away from incompatible materials such as acids and strong oxidizers, avoid moisture exposure—product absorbs water from air
Storage Class: Chemical storage for non-combustible solids or rare earth metals
Incompatibilities: Strong acids, moisture, oxidizers
Exposure Limits: No OSHA or ACGIH exposure limits, but NIOSH recommends controlling particulate levels below nuisance dust standards (10 mg/m³ total; 3 mg/m³ respirable)
Engineering Controls: Use fume hood or local exhaust, closed process systems as possible, regularly clean work surfaces
Personal Protective Equipment: Chemical-resistant gloves, safety goggles or face shield, NIOSH-approved respirator when dust is present, lab coats or coveralls
Hygiene Measures: Wash hands, avoid eating or drinking in handling area, launder clothing exposed to dust
Appearance: White powder or granules
Odor: Odorless
Odor Threshold: Not applicable
pH: Slightly basic with water
Melting Point: About 2,315°C
Boiling Point: Approximately 4,200°C (decomposes)
Flash Point: Not flammable
Solubility: Insoluble in water, reacts slowly with moisture
Vapor Density: Not applicable for solid
Evaporation Rate: Not applicable
Specific Gravity: 6.51 (water=1)
Particle Size: Fine powder commonly below 10 microns, commercial grades can vary
Chemical Stability: Stable under recommended storage conditions
Reactivity: Absorbs moisture and CO₂ slowly from air
Hazardous Reactions: Liberates heat upon contact with strong acids, produces lanthanum salts
Conditions to Avoid: Exposure to strong acids, high humidity environments, extreme temperatures
Incompatible Materials: Strong oxidizers, concentrated mineral acids, moisture
Hazardous Decomposition Products: Lanthanum chloride, other lanthanum salts (rarely under normal conditions)
Routes of Exposure: Eyes, skin, inhalation, ingestion
Acute Effects: Dust causes mechanical respiratory irritation, cough, wheezing, nose and throat soreness, possible eye redness and skin dryness
Chronic Effects: No conclusive long-term toxicity in humans, prolonged dust exposure may worsen pre-existing pulmonary issues
Sensitization: Not reported
Cancer Information: No components are listed as carcinogenic by IARC, NTP, or OSHA
LD50 (oral, rat): Data not available, expected to be low acute oral toxicity
Ecotoxicity: Limited data; rare earth oxides can be mildly toxic to aquatic organisms at high concentrations
Persistence and Degradability: Insoluble and persistent in soil and sediment
Bioaccumulation: Little tendency to bioaccumulate in animals
Mobility in Soil: Binds strongly to soil, low mobility
Other Effects: Dust can increase turbidity of water, may impact aquatic habitats for filter feeders
Disposal Methods: Collect solid waste in sealed containers, label clearly for rare earth waste, transfer to licensed chemical disposal facility
Product Disposal: Avoid direct release to environment, never flush to sewer or waterways
Contaminated Packaging: Rinse containers, dispose in accordance with national/local regulations
Precautionary Measures: Prevent dispersal of dust, handle residue and packaging as hazardous material
UN Number: Not classified as dangerous goods for transport
Transport Hazard Class: Not regulated
Packing Group: Not applicable
Proper Shipping Name: Lanthanum(III) oxide
Special Transport Precautions: Cover containers to prevent spillage, keep dry during transport, secure against shifting during movement, comply with local shipping regulations
OSHA Status: Not specifically regulated in the US
TSCA Status: Listed in US Toxic Substances Control Act inventory
REACH Registration (EU): Registration required for import over 1 tonne per annum
SARA Title III Sections 302/304/313: Not listed
Canada DSL: Listed
Other Regulations: Local workplace safety requirements, dust exposure standards, consult regional, national, and international laws governing manufacturing, storage, and disposal of rare earth compounds
