Synonyms: Lanthanum Trioxide; Lanthanum Sesquioxide
CAS No.: 1312-81-8
Molecular Weight: 325.82
Chemical Formula: La2O3
Product Codes: 121115
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------------ ---------
Lanthanum Oxide 1312-81-8 100% Yes
Inhalation: Not expected to be a health hazard via inhalation. May cause
irritation to the respiratory tract. Symptoms may include coughing and shortness
of breath. Other symptoms may parallel those from ingestion.
Ingestion: Not expected to be a health hazard via ingestion. May cause headache, malaise, chills, fever, nausea, muscle pains, abdominal cramps, and hemoglobinuria (free blood in the urine).
Skin Contact: Not expected to be a health hazard from skin exposure. May cause slight irritation.
Eye Contact: May cause irritation, redness and pain. May cause conjunctivitis or corneal damage.
Chronic Exposure: Repeated exposure may cause symptoms similar to those listed for acute effects.
Aggravation of Pre-existing Conditions: No information found.
Inhalation: Remove to fresh air. Get medical
attention for any breathing difficulty.
If swallowed, give several glasses of water to drink to dilute. If large amounts were swallowed or symptoms occur, get medical advice. Never give anything by mouth to an unconscious person.
Eye Contact: Immediately flush eyes with plenty of water for at least 15 minutes, lifting upper and lower eyelids occasionally. Get medical attention if irritation persists.
Note to Physician: Consider determining blood serum hemoglobin values. Values of about 9% would be indicative of overexposure.
Fire: This material is noncombustible.
Explosion: Not considered to be an explosion hazard. Sensitive to static discharge.
Fire Extinguishing Media: Use any means suitable for extinguishing surrounding fire. If at all posssible, avoid using water spray since this material reacts violently with water. If possible without risk, remove containers from fire area. Do not allow water runoff to enter sewers or waterways.
Special Information: In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode.
Ventilate area of leak or spill. Wear appropriate personal protective equipment as specified in Section 8. Spills:
Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage. Avoid dust formation and control ignition sources. Employ grounding, venting and explosion relief provisions in accord with accepted engineering practices in any process capable of generating dust and/or static electricity. Empty only into inert or non-flammable atmosphere. Emptying contents into a non-inert atmosphere where flammable vapors may be present could cause a flash fire or explosion due to electrostatic discharge. Isolate from incompatible substances. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.
Airborne Exposure Limits: None established.
Ventilation System: In general, dilution ventilation is a satisfactory health hazard control for this substance. However, if conditions of use create discomfort to the worker, a local exhaust system should be considered.
Personal Respirators (NIOSH Approved): For conditions of use where exposure to dust or mist is apparent and engineering controls are not feasible, a particulate respirator (NIOSH type N95 or better filters) may be worn. If oil particles (e.g. lubricants, cutting fluids, glycerine, etc.) are present, use a NIOSH type R or P filter. For emergencies or instances where the exposure levels are not known, use a full-face positive-pressure, air-supplied respirator. WARNING: Air-purifying respirators do not protect workers in oxygen-deficient atmospheres.
Skin Protection: Wear protective gloves and clean body-covering clothing.
Eye Protection: Use chemical safety goggles and/or full face shield where dusting or splashing of solutions is possible. Maintain eye wash fountain and quick-drench facilities in work area.
Appearance: White to yellowish-white amorphous
Solubility: Insoluble in water.
Density: 6.51 at 15C (59F) 5.87 at 25C (77F)
% Volatiles by volume @ 21C (70F): 0
Boiling Point: 4200C (7592F)
Melting Point: 2315C (4199F)
Vapor Density (Air=1): Not applicable.
Vapor Pressure (mm Hg): Not applicable.
Evaporation Rate (BuAc=1): No information found.
Stability: Lanthanum oxide readily absorbs carbon
dioxide from air.
Hazardous Decomposition Products: None reported.
Hazardous Polymerization: Will not occur.
Incompatibilities: Lanthanum oxide is incompatible with chlorine triflouride and water. It reacts violently with water, vigorously producing heat, accompanied by a hissing action.
Conditions to Avoid: Avoid excessive dust generation and contact with incompatibles. Avoid contact with acids.
For Lanthanum Oxide: LD50 Oral Rat: >9968 mg/kg. Irritation Data: Eye, Rabbit, Std Draize, 100 mg, mild.
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Lanthanum Oxide (1312-81-8) No No None
Environmental Fate: No information found.
Environmental Toxicity: No information found.
Whatever cannot be saved for recovery or recycling should be handled as hazardous waste and sent to a RCRA approved waste facility. Processing, use or contamination of this product may change the waste management options. State and local disposal regulations may differ from federal disposal regulations. Dispose of container and unused contents in accordance with federal, state and local requirements.
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