Product Name: 2,2,6,6-Tetramethylpiperidinooxy (TEMPO)
Synonyms: TEMPO, 2,2,6,6-Tetramethylpiperidine 1-oxyl, TEMPO free radical
Recommended Use: Laboratory chemical, chemical synthesis, oxidation reactions
Manufacturer: Supplier’s contact details normally found on product label
CAS Number: 2564-83-2
UN Number: Not assigned
Emergency Contact: Local fire department or poison control center
Classification: Acute toxicity (oral, dermal), skin irritant, eye irritant, specific target organ toxicity (single and repeated exposure)
Signal Word: Warning
Hazard Statements: Harmful if swallowed, irritates skin and eyes, may cause respiratory irritation, toxic to aquatic organisms
Pictograms: Exclamation Mark, Health hazard
Precautionary Statements: Wear protective gloves, avoid breathing dust, wash hands thoroughly after handling, use only outdoors or in a well-ventilated area, dispose according to regulations
Chemical Name: 2,2,6,6-Tetramethylpiperidinooxy
Concentration: 98-100%
Molecular Formula: C9H18NO
Molecular Weight: 156.25 g/mol
Impurities: Remaining proprietary components are not considered hazardous at reported concentrations
Inhalation: Move individual to fresh air. If breathing becomes difficult, provide oxygen support and seek medical attention
Ingestion: Rinse mouth with water, do not induce vomiting, consult a physician or poison control
Skin Contact: Remove contaminated clothing and rinse skin with soap and water, seek medical attention for persistent irritation
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, continue rinsing, get medical advice when irritation persists
Delayed Effects: Watch for symptoms like dizziness, coughing, sore throat, or rashes
Suitable Extinguishing Media: Carbon dioxide, dry chemical, foam, or water spray
Unsuitable Extinguishing Media: High-pressure water streams may spread fire
Thermal Decomposition Products: Oxides of nitrogen, carbon monoxide, carbon dioxide
Fire Hazards: May emit toxic fumes under fire conditions
Protective Equipment: Firefighters should wear full protective gear and self-contained breathing apparatus
Explosion Data: No known explosive properties for this compound
Personal Precautions: Avoid breathing dust, ventilate area, use personal protective equipment including gloves and goggles
Environmental Precautions: Prevent further leakage or spillage if safe, keep product out of drains, surface waters and soil
Cleanup Methods: Sweep up material without creating dust, keep in closed containers for disposal, wash spill site after material pick-up
Reference to Other Sections: For waste disposal see section “Disposal Considerations”
Handling: Avoid direct contact with skin, eyes, and clothing, use only in fume hood or well-ventilated space, do not eat, drink, or smoke in work area
Storage Conditions: Store in a cool, dry, well-ventilated area, away from incompatible substances such as strong acids, bases, and oxidizers, tightly closed container recommended
Incompatibilities: Reacts with strong acids, strong bases, reducing agents
Special Requirements: Keep container tightly sealed
Exposure Limits: No occupational exposure limits established by OSHA or ACGIH
Engineering Controls: Chemical fume hood, eye wash station, safety shower
Personal Protective Equipment: Chemical-resistant gloves (nitrile or similar material), safety goggles, lab coat
Respiratory Protection: Use air-purifying respirator if exposure risk exists
Hygiene Measures: Wash hands after handling, avoid contact with skin, eyes, and clothing, launder contaminated clothing before reuse
Appearance: Orange to red crystalline solid
Odor: Mild, characteristic
Odor Threshold: Not available
pH: Not applicable (solid form)
Melting Point: 35-38°C
Boiling Point: Not determined
Flash Point: >113°C (closed cup)
Flammability: Not flammable under normal conditions
Vapor Pressure: Negligible at room temperature
Solubility: Soluble in polar organic solvents, slightly soluble in water
Partition Coefficient (Log Kow): Estimated 1.75
Vapor Density: Not available
Explosive Properties: Not considered explosive
Oxidizing Properties: Strong oxidizer in certain conditions
Decomposition Temperature: Not available
Chemical Stability: Stable under recommended storage conditions
Reactivity: Strong oxidizing agent, reacts vigorously with strong reducing agents
Conditions to Avoid: Exposure to moisture, heat, incompatible materials
Hazardous Reactions: Combustion may release toxic gases
Incompatible Materials: Strong acids, strong bases, reducing agents
Hazardous Decomposition Products: Nitrogen oxides, carbon monoxide, carbon dioxide under fire
Acute Toxicity: Oral (rat): LD50 between 200-300 mg/kg. Inhalation: May cause respiratory tract irritation. Dermal: May irritate skin
Skin Corrosion/Irritation: Can cause redness, itching, and mild swelling
Serious Eye Damage/Irritation: May cause stinging, redness, watering
Respiratory and Skin Sensitization: Sensitization not established in animal studies
Mutagenicity/Carcinogenicity: No direct evidence of mutagenic or carcinogenic effects in animal studies
Reproductive Toxicity: Effects not fully studied
Chronic Effects: Prolonged or repeated exposure may cause persistent skin and respiratory system irritation
Ecotoxicity: Harmful to aquatic life, especially with long-term exposure
Persistence and Degradability: Not readily biodegradable in standard test systems
Bioaccumulative Potential: Low, but accumulation in aquatic organisms cannot be ruled out
Mobility in Soil: Moderately mobile in soil, may leach into groundwater
Other Adverse Effects: Ozone depletion or global warming effects are not expected
Waste Treatment Methods: Dispose as hazardous chemical waste in accordance with local, regional, and national regulations
Contaminated Packaging: Triple rinse containers, dispose as per hazardous waste guidelines
Special Precautions: Do not allow material to enter drains or watercourses
Disposal Code: Relevant to local authorities—usually non-halogenated organic waste
UN Number: Not regulated for transport
UN Proper Shipping Name: Not classified as dangerous good under transport regulations
Transport Hazard Classes: None assigned
Packing Group: No restriction
Environmental Hazards: None identified during normal transportation
Bulk Transport (Marpol/IBC): Not applicable
Special Precautions for User: Avoid dust release during transport, keep in tightly sealed containers
Global Inventories: Listed in TSCA (US), EINECS (EU), DSL (Canada), AICS (Australia)
OSHA: Not classified as hazardous under OSHA Hazard Communication Standard
SARA Title III: Not listed as a reportable toxic chemical
California Proposition 65: Product does not contain any chemicals known to the State of California to cause cancer or reproductive toxicity
REACH Status: Registered or exempt as per ECHA guidelines
Hazard Classification: Classified under GHS as harmful
