Material Safety Data Sheet (MSDS) for Metastannic Acid

Identification

Product Name: Metastannic Acid
Chemical Formula: H2SnO3
CAS Number: 12027-70-2
Synonyms: Tin(IV) oxide hydrate, Stannic Acid
Recommended Use: Catalyst, ceramic glazing, chemical synthesis
Manufacturer Details: Name, address, and emergency phone number of supplier should be clearly noted for any user reference.
Emergency Contact: Local poison control center or company safety officer.

Hazard Identification

Classification: Classified as an irritant to eyes, skin, and respiratory system; does not meet GHS criteria for other classes.
Label Elements: Exclamation mark symbol; signal word - Warning; hazard statements include "causes skin and eye irritation" and "may cause respiratory irritation".
Health Hazards: Skin/eye contact can cause redness and irritation; inhalation may cause coughing or shortness of breath; ingestion is not recommended.
Environmental Hazards: Can be harmful to aquatic environments at high concentrations.
Other Hazards: Dust may aggravate pre-existing lung conditions such as asthma.

Composition / Information on Ingredients

Chemical Name: Metastannic Acid
Concentration: 98-100%
CAS Number: 12027-70-2
Molecular Formula: H2SnO3
Impurities: Trace amounts of tin dioxide and unreacted stannous compounds possible depending on manufacturer.

First Aid Measures

Eye Contact: Immediately flush eyes with plenty of water for at least 15 minutes; remove contact lenses if present and easy to do; seek medical attention if irritation persists.
Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing; get medical help if irritation develops.
Inhalation: Move person to fresh air; seek medical advice if symptoms such as coughing or difficulty breathing occur.
Ingestion: Rinse mouth with water; do not induce vomiting; consult a physician if significant quantities swallowed.
Most Important Symptoms: Irritation to skin, eyes, and respiratory tract.

Fire-Fighting Measures

Suitable Extinguishing Media: Use water spray, foam, dry chemical, or carbon dioxide; choose media best suited to surrounding fire.
Specific Hazards: Product is not flammable, but decomposition in fire can release toxic metal oxide fumes.
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear.
Special Procedures: Avoid runoff into drains and watercourses; isolate area and stay upwind during a fire.

Accidental Release Measures

Personal Precautions: Avoid dust formation; use appropriate personal protective equipment such as gloves and goggles.
Methods for Cleaning Up: Sweep up gently to avoid dust; use damp paper towels or HEPA vacuum for small spills; place in a suitable container for disposal.
Environmental Precautions: Prevent entry into waterways, soil, or drains; notify authorities in case of large spills.
Cleanup Personnel: Wear appropriate personal protective equipment and ensure area is well-ventilated.

Handling and Storage

Safe Handling Procedures: Handle in a well-ventilated area; avoid inhaling dust; wash hands after use; do not eat, drink, or smoke when using.
Storage Requirements: Store in a cool, dry, well-ventilated area in a tightly closed container; protect from moisture.
Further Precautions: Keep away from incompatible substances like strong acids and bases to avoid hazardous reactions.
Storage Class: Chemical storage, general.

Exposure Controls and Personal Protection

Exposure Limits: No established occupational exposure limits for metastannic acid; observe limits for related inorganic tin compounds; workplace monitoring recommended if dust levels rise.
Engineering Controls: Use local exhaust ventilation or process enclosure to minimize dust.
Personal Protective Equipment: Safety goggles, gloves (nitrile, neoprene), lab coat; particulate respirator if dusts are generated.
Hygiene Measures: Wash hands before breaks and at end of work; remove contaminated clothing.

Physical and Chemical Properties

Appearance: White to off-white powder or granular solid.
Odor: Odorless
pH: Slightly acidic in water
Melting Point: Decomposes before melting
Solubility: Insoluble in water; soluble in concentrated acids
Boiling Point: Not applicable; decomposes
Vapor Pressure: Not applicable
Density: About 4.78 g/cm³
Other Properties: Stable under recommended storage conditions; hygroscopic tendency noted at high humidity.

Stability and Reactivity

Chemical Stability: Stable under normal temperatures and pressures.
Reactivity: Reacts with strong acids and alkalis producing tin salts and hydrogen gas.
Hazardous Decomposition Products: Releases stannic oxide fumes and hydrogen on decomposition.
Conditions to Avoid: Moisture, exposure to strong acids and bases, dusty conditions.
Incompatible Materials: Strong oxidizers, strong acids, strong bases.

Toxicological Information

Acute Toxicity: Data on metastannic acid is limited, but related tin compounds show low toxicity.
Routes of Exposure: Inhalation, skin and eye contact, ingestion.
Symptoms: Eye/skin irritation, coughing, sore throat.
Chronic Exposure: Chronic exposure to tin compounds may cause "stannosis," a benign pneumoconiosis with deposits in the lungs.
Carcinogenicity: Not classified as carcinogenic by major agencies (OSHA, ACGIH, NTP, IARC).
Sensitization: Not expected to cause allergic reactions.
Mutagenicity, Reproductive Toxicity: No data.

Ecological Information

Aquatic Toxicity: Can be toxic to aquatic organisms in high concentrations.
Bioaccumulation Potential: Low for metastannic acid; metallic tin and some tin compounds accumulate in certain aquatic species.
Mobility in Soil: Product tends to remain immobile and bind to soil particles.
Persistence and Degradability: Inorganic compound, remains in environment without degradation.
Other Adverse Effects: Avoid release into the environment.

Disposal Considerations

Waste Disposal Methods: Collect and place waste into sealed containers; label for chemical waste disposal; follow local, regional, and national regulations.
Contaminated Packaging: Dispose of packaging as hazardous waste if it has been in contact with metastannic acid.
Recovery/Conversion: No recovery route; do not discharge into drains or waterways.
Additional Advice: Consult a licensed waste disposal contractor for responsible disposal.

Transport Information

UN Number: Not regulated for transport as a hazardous material.
Proper Shipping Name: Metastannic Acid or Tin Compound, Not Otherwise Specified
Transport Hazard Class: None assigned.
Packing Group: None assigned.
Special Precautions: Avoid spills during transport; secure containers.

Regulatory Information

US TSCA Status: Listed
Canada DSL/NDSL: Listed/DSL
EU REACH Registration: Not listed as a substance of very high concern.
OSHA Hazard Communication: Covered under the Hazard Communication Standard as an irritant.
SARA Title III, Section 313: Not subject.
Other Regulations: Check local, state, federal, and international regulations for specific reporting and usage requirements.