Material Safety Data Sheet (MSDS) – Stannous Pyrophosphate

1. Identification

Product Name: Stannous Pyrophosphate
Chemical Formula: Sn2P2O7
Recommended Use: Laboratory chemicals, industrial processing, oral care products
Supplier: Chemical manufacturer or distributor details provided on purchase documentation
Emergency Contact: Local emergency numbers, or supplier’s emergency response line
CAS Number: 13566-25-1
Synonyms: Tin(II) pyrophosphate, Pyrophosphoric acid, stannous salt

2. Hazard Identification

Classification: Irritant to eyes, skin, and respiratory tract
GHS Label Elements: Pictogram includes exclamation mark, warning label
Signal Word: Warning
Hazard Statements: Causes eye and skin irritation, risk of respiratory irritation
Precautionary Statements: Wear protective gloves and eye protection, avoid breathing dust or fumes, wash hands thoroughly after handling, use only in well-ventilated areas
Potential Health Effects: Eye contact causes burning or redness; skin exposure produces mild discomfort or rash; inhalation may irritate nose and throat; ingestion brings nausea or gastrointestinal upset. Chronic exposure may damage organs with repeated contact.
NFPA Ratings: Health: 2, Flammability: 0, Reactivity: 1

3. Composition / Information on Ingredients

Chemical Name: Stannous Pyrophosphate
Common Name: Tin(II) pyrophosphate
Formula: Sn2P2O7
Concentration: 98-100% pure
Impurities: Very low, varies with manufacturer batch; trace metals possible
CAS Number: 13566-25-1
EC Number: 236-944-7

4. First Aid Measures

Eye Contact: Rinse thoroughly for 15 minutes with running water, lifting eyelids frequently. Immediate medical attention recommended for irritation.
Skin Contact: Remove contaminated clothing, rinse affected skin with soap and water, seek medical advice if irritation persists.
Inhalation: Move to fresh air, ensure open circulation, consult medical staff if symptoms appear.
Ingestion: Rinse mouth, seek medical advice promptly, avoid inducing vomiting unless directed by physician.
Signs and Symptoms: Eye and skin redness, respiratory discomfort, nausea.

5. Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide, water spray for surrounding fires
Unsuitable Extinguishing Media: Do not use direct water stream that could spread material
Special Hazards: Does not burn easily, releases toxic tin fumes and phosphorous oxides under intense heat
Protective Equipment: Firefighters require self-contained breathing apparatus and full protective clothing
Firefighting Instructions: Use water spray to keep containers cool during fire exposure, avoid inhalation of decomposition gases, evacuate non-essential personnel

6. Accidental Release Measures

Personal Precautions: Wear gloves, goggles, and lab coat to avoid powder contact. Use dust mask if ventilation is inadequate.
Environmental Precautions: Prevent runoff into drains, water sources, or soil. Report larger spills to environmental authorities following local regulations.
Clean-Up Methods: Scoop up spilled powder with non-sparking tools, sweep into a designated waste container. Wash contaminated area with water to remove residues. Dispose of materials in accordance with local disposal guidelines.
Emergency Procedures: Restrict access to spill zone, ventilate area, secure all ignition sources

7. Handling and Storage

Handling: Keep container tightly closed, use with adequate ventilation, avoid contact with eyes, skin, and clothing. Do not inhale dust. Use personal protective equipment as required. Practice good hygiene after handling.
Storage Conditions: Store in a cool, dry, ventilated area away from incompatible materials such as acids, strong oxidizers, or moisture. Use sealed, labeled containers. Segregate from food and beverages.
Incompatible Materials: Strong acids, oxidizing agents. Avoid contact with water and humid air.
Safe Storage Advice: Lock storage cabinets, keep away from direct sunlight, post hazard signage

8. Exposure Controls and Personal Protection

Occupational Exposure Limits: OSHA Permissible Exposure Limit (PEL) for tin compounds (as Sn): 2 mg/m³ TWA
Engineering Controls: Local exhaust ventilation or fume hoods recommended in processing areas to minimize dust
Personal Protective Equipment: Wear chemical-resistant gloves, safety goggles, face shield for high-risk operations, long-sleeved lab coat or apron. Use approved NIOSH dust mask when exposure risk is high.
Respiratory Protection: Use properly fitted respirator if exposure may exceed limits.
Hygiene Measures: Wash hands and face after handling, remove contaminated clothing before eating or drinking

9. Physical and Chemical Properties

Appearance: White to off-white odorless powder
Odor: None
Boiling Point: Not applicable (decomposes before boiling)
Melting Point: Decomposes at high temperatures
Solubility: Sparingly soluble in water
pH: Not determined
Specific Gravity: Approximately 4.5 g/cm³
Vapor Pressure: Negligible
Evaporation Rate: Not applicable
Flash Point: Non-flammable
Decomposition Temperature: Decomposes, emitting tin and phosphorus oxides
Partition Coefficient: Not determined
Auto-Ignition Temperature: Not applicable

10. Stability and Reactivity

Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: May react with strong acids or oxidizers
Conditions to Avoid: Heat, moisture, direct sunlight, contact with incompatible materials
Hazardous Decomposition Products: Tin oxides, phosphorus oxides
Polymerization: Not expected to occur
Incompatibilities: Acids, oxidizers, strong alkalis, sources of ignition

11. Toxicological Information

Acute Toxicity: Data limited, estimated LD50 (oral, rat): >2000 mg/kg
Chronic Toxicity: Prolonged exposure may affect liver, kidneys, or blood-forming organs
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Symptoms: Irritation, redness, possible nausea
Sensitization: Not known to cause allergic sensitization
Mutagenicity: Not classified as mutagenic
Carcinogenicity: Not classified as a carcinogen by IARC, NTP, or OSHA
Reproductive Effects: Limited data, no known risk at typical exposure levels

12. Ecological Information

Ecotoxicity: Toxic to aquatic organisms at significant concentrations
Persistence: Not readily biodegradable, remains stable in environment
Bioaccumulation: Low potential
Mobility in Soil: Limited, binds with minerals in soil
Aquatic Toxicity: Harmful to fish and invertebrates at high concentrations; avoid release to waterways
Environmental Precautions: Prevent spillages from entering drains or surface water

13. Disposal Considerations

Waste Treatment Methods: Collect solid material in suitable containers; label hazard. Dispose through specialized hazardous waste facility in compliance with local, regional, and national waste management regulations.
Contaminated Packaging: Rinse and dispose containers using approved hazardous waste procedures.
Recommendations: Do not release to environment or landfill with non-hazardous waste
Other Considerations: Consult waste disposal authority for guidance

14. Transport Information

UN Number: Not classified as dangerous for transport
UN Proper Shipping Name: Not regulated
Transport Hazard Class: Not applicable
Packing Group: Not assigned
Special Precautions: Protect containers from physical damage and moisture during transportation
Emergency Response Guide: Spilled powder requires containment and prompt clean-up
Land, Air, Sea Requirements: Shipping documentation should include chemical name and hazard notes where local laws require

15. Regulatory Information

TSCA: Listed in the United States Toxic Substances Control Act Inventory
REACH: Registered or pre-registered for use in the European Union
OSHA Hazards: Classified as hazardous (irritant)
WHMIS (Canada): Classification D2B (Toxic Material Causing Other Toxic Effects)
SARA Title III Sections 311/312: Acute health hazard
Labeling Requirements: Comply with OSHA Hazard Communication Standard, include hazard pictograms, signal words, precautionary statements
Other Regulations: Check state, provincial, or local laws for additional requirements