Cyanuric Acid Material Safety Data Sheet (MSDS)

Identification

Product Name: Cyanuric Acid
Other Names: Isocyanuric acid, Pool Conditioner, Stabilizer
CAS Number: 108-80-5
Molecular Formula: C3H3N3O3
Recommended Use: Water treatment, pool chlorination stabilizer
Supplier Details: Chemical manufacturers and pool supply companies
Contact Information: Refer to product packaging for emergency phone numbers and address
Emergency Overview: White, odorless powder or granules used mainly for stabilizing chlorine in pool water

Hazard Identification

Classification: Not classified as hazardous under GHS for most uses, can cause mild irritation
Physical Hazards: Dust may cause eye and respiratory irritation
Health Hazards: Prolonged contact can result in minor nose, throat, skin, and eye irritation
Environmental Hazards: Slightly hazardous to aquatic environments in significant quantities
Pictograms: No specific pictogram required under GHS for this compound
Signal Word: Not required
Hazard Statements: May cause minor respiratory and eye irritation if dust is inhaled or contacted
Precautionary Statements: Ensure proper ventilation. Use personal protective equipment if heavy exposure is expected.

Composition / Information on Ingredients

Main Ingredient: Cyanuric Acid
Chemical Formula: C3H3N3O3
Concentration: 98-100% for technical grade products
Impurities: Traces of water, possible traces of sodium or calcium salts
Form: Powder, granular, crystalline

First Aid Measures

Inhalation: Move affected person to fresh air. Seek medical attention for persistent irritation.
Skin Contact: Wash off thoroughly with soap and water. Remove contaminated clothing.
Eye Contact: Rinse eyes carefully with plenty of water for at least 15 minutes. Medical attention if irritation persists.
Ingestion: Rinse mouth. Do not induce vomiting. Seek medical advice if large amount ingested.
Symptoms: Possible mild itching, burning, coughing, or sneezing after exposure to dust

Fire-Fighting Measures

Suitable Extinguishing Media: Water spray, foam, dry powder, or carbon dioxide for surrounding fire
Unsuitable Media: None known for this compound
Specific Hazards: Thermal decomposition may create nitrogen oxides and cyanuric derivatives
Protective Equipment: Firefighters should use standard protective clothing and self-contained breathing apparatus
Advice: Prevent runoff of contaminated firefighting water into drains or water sources

Accidental Release Measures

Personal Precautions: Limit exposure to dust. Use face mask or respirator if available.
Protective Equipment: Dust mask, gloves, goggles recommended during cleanup
Emergency Procedures: Evacuate unnecessary personnel. Ventilate the area.
Spill Handling: Sweep up without creating dust. Place material in labeled containers.
Disposal: Refer to local waste disposal guidelines for chemical waste.
Environmental Precautions: Avoid spillage into water systems. Use barriers if needed.

Handling and Storage

Handling Precautions: Work in well-ventilated area. Minimize creation of dust.
Hygiene Measures: Wash hands after handling. Do not eat or drink during use.
Storage Requirements: Keep containers tightly closed and dry. Store in cool, well-ventilated location away from incompatible substances.
Incompatibilities: Strong oxidizers, acids, alkalis, or chlorine-releasing compounds

Exposure Controls and Personal Protection

Exposure Limits: No established occupational exposure limits for cyanuric acid
Technical Controls: Use local exhaust ventilation and minimize airborne dust
Personal Protection: Safety goggles, dust mask, gloves, long sleeves
Respiratory Protection: Use respirator when handling large quantities in confined area
Eye Protection: Chemical safety goggles
Hand Protection: Appropriate chemical-resistant gloves
Skin Protection: Protective workwear

Physical and Chemical Properties

Appearance: White crystalline powder or granules
Odor: Odorless
pH (1% solution): Slightly acidic, typically around 4.0
Melting Point: Decomposes at approximately 330°C
Boiling Point: Not applicable (decomposes before boiling)
Solubility: Low solubility in cold water; better in hot water
Density: About 2.5 g/cm³
Vapor Pressure: Not volatile
Partition Coefficient: log Pow -1.37
Other Data: Stable under recommended conditions

Stability and Reactivity

Chemical Stability: Stable under normal handling and storage
Possible Reactions: Can react with strong oxidizers, chlorine, and acids
Conditions to Avoid: Excess heat, mixing with incompatible chemicals
Hazardous Decomposition: Nitrogen oxides, carbon monoxide, and cyanuric derivatives may form with decomposition
Polymerization: Will not occur

Toxicological Information

Acute Toxicity: Low toxicity by oral, dermal, or inhalation exposure
LD50 Oral (rat): 3400 mg/kg
LD50 Dermal (rabbit): > 2000 mg/kg
Skin Irritation: Not expected to be harmful; may cause minor irritation in sensitive individuals
Eye Irritation: Mild irritation possible
Respiratory Effects: Exposure to dust can cause coughing, sneezing, or throat irritation
Chronic Effects: No reported long-term health effects from normal use
Sensitization: Not reported as a sensitizer
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA

Ecological Information

Ecotoxicity: Slightly hazardous in large quantities, rapidly dilutes in surface water
Aquatic Toxicity: Low toxicity to fish and aquatic organisms
Persistence and Degradability: Slowly biodegradable
Bioaccumulative Potential: Does not accumulate significantly in aquatic systems
Mobility in Soil: Low mobility, binds to soil particles
Other Adverse Effects: No long-term environmental impact reported under normal use scenarios

Disposal Considerations

Waste Treatment Methods: Dispose in accordance with local, regional, and national regulations
Contaminated Packaging: Handle as chemical waste, ensure containers are completely empty or cleaned
Waste Codes: No specific RCRA hazardous waste code, but avoid direct disposal to water sources
Special Precautions: Do not attempt neutralization with acids or bases

Transport Information

UN Number: Not regulated for transport
Proper Shipping Name: Cyanuric Acid
Transport Hazard Class: Not classified as hazardous for road, rail, sea, or air transport
Packing Group: Not assigned
Label Requirements: None required
Environmental Hazards: Not a marine pollutant
Special Precautions: Minimize dust during loading and unloading

Regulatory Information

US OSHA Classification: Not classified as hazardous
US TSCA Inventory: Listed
Canada DSL: Listed
EU Classification: Not classified as hazardous under REACH
GHS Compliance: Does not trigger major hazard statements
EPA Status: Approved for limited water treatment use
Labeling Requirements: Standard industry labeling for chemical products
Other National Regulations: Refer to specific country requirements for storage and environmental release