Chemical Name: 1,1,1-Tris(4-hydroxyphenyl)ethane
Synonyms: THPE, Tris(p-hydroxyphenyl)ethane
CAS Number: 27955-94-8
Formula: C20H18O3
Physical Form: Off-white to pale-yellow crystalline solid
Common Uses: Widely used as a monomer or intermediate in plastic and polymer manufacturing, particularly for specialty resins where a high degree of thermal stability is needed.
Hazard Classification: Material usually classified as non-flammable solid; generally considered of low acute toxicity but can irritate eyes and skin if handled carelessly.
Potential Health Effects: Eye contact might cause stinging or redness; skin contact can sometimes produce dryness or localized rash for sensitive individuals; inhalation of dust may irritate mucous membranes.
Environmental Risks: Granular solid does not vaporize at room temperature, limiting risks via inhalation except during significant spills or processing incidents; dust presents inhalation hazard on improperly ventilated sites.
Symbolic Markings: No GHS pictograms typically required, but as with most industrial chemicals, better to exercise more caution than less.
Component: 1,1,1-Tris(4-hydroxyphenyl)ethane (main ingredient)
Concentration: Often supplied close to 100% purity in most applications; impurities or additives rarely found unless specified for processing purposes.
Other ingredients: No additional chemical stabilizers or inert materials commonly present; any impurities are usually minor and not expected to alter primary health or safety profile for most users.
Eye Contact: Rinse gently with water for several minutes; remove contacts if easy to do; continuing irritation demands medical attention.
Skin Contact: Wash exposed area with soap and water; persistent symptoms call for medical oversight.
Inhalation: Move person to fresh air; if coughing or breathing trouble arises, seek medical supervision.
Ingestion: Rinse mouth; avoid forcing vomiting; seek professional care if large quantities were swallowed or adverse effects noticed.
Suitable Extinguishing Media: Water spray, regular foam, dry chemical, or carbon dioxide work effectively; product does not burn easily but processing dust can form explosive atmospheres in rare cases.
Special Hazards: Combustion produces carbon dioxide, carbon monoxide, possible phenolic vapors.
Protective Equipment: Firefighters need full protective gear and, in heavy smoke, self-contained breathing apparatus; runoff from fire control can carry residues, so avoid releasing into storm drains.
Personal Protection: Use safety glasses, protective gloves, dust mask when cleaning up spills.
Spill Response: Sweep up solid carefully without creating dust clouds; collect in appropriate container; do not flush to sewer or open waterways.
Environmental Considerations: Minimize entry to soil, surface water or drains to limit environmental risk; residues and wash solutions should be safely contained.
Handling: Limit routine exposure to open air and repeated handling to reduce dusting and skin contact; wear protective equipment during transfer or processing steps producing fine powders.
Storage: Store in well-ventilated, cool and dry area; keep away from strong oxidizers or direct sources of heat; close containers tightly between uses to avoid contamination and moisture uptake.
Engineering Controls: Use local exhaust or mechanical ventilation if processing produces airborne powder.
Personal Protection: Protective glasses or goggles prevent accidental eye contact; nitrile or latex gloves keep skin contact minimal; standard work clothing and dust mask or respirator when dealing with visible dust.
Hygiene Measures: Wash hands before eating or drinking; remove contaminated clothing; do not eat or smoke in handling areas.
Appearance: Off-white to pale-yellow crystalline powder
Odor: Mild phenolic
Melting Point: Typically above 200°C
Solubility: Poorly soluble in water; soluble in organic solvents like ethanol or acetone
Density: Usually close to 1.3 g/cm³
Vapor Pressure: Negligible at room temperature
Chemical Stability: Stable under recommended storage conditions; decomposition can occur if exposed to prolonged heat or strong acids.
Reactivity: May react with strong oxidizing agents; does not polymerize spontaneously.
Hazardous Decomposition Products: High temperatures generate carbon monoxide, carbon dioxide and possible phenolic by-products.
Acute Toxicity: Low oral and dermal toxicity reported in animal studies; large doses may irritate gut and digestive tract.
Chronic Exposure: No confirmed cases of chronic toxicity in regular workplace settings; irritation more frequent than systemic symptoms.
Inhalation Effects: Dust inhalation often causes nose and throat irritation; respirable dust in high concentrations should be avoided.
Skin and Eye Contact: Mild irritation if not washed away quickly; no known cases of severe burns or sensitization from routine contact.
Ecotoxicity: Information on persistence and aquatic toxicity limited, but like many phenolic compounds, large releases may stress aquatic organisms.
Mobility in Soil: Low water solubility limits spread in groundwater or stormwater.
Degradability: Biodegradation rate not well-known; generally expected to break down slowly if released to environment.
Preferred Options: Dispose of material through licensed chemical waste management companies, ensuring collection in sealed, labeled containers.
Precautions: Dust suppression and personal safety equipment during packaging and movement of waste recommended; never incinerate outside approved facilities.
UN Number: Not classified as hazardous for ground, sea, or air shipment based on current international transport rules.
Proper Shipping Name: 1,1,1-Tris(4-hydroxyphenyl)ethane
Packing Group: No assignment needed for standard shipments of this substance.
Inventory Status: Substance listed in global chemical inventories such as TSCA and REACH without special restrictions.
Workplace Safety: No OSHA exposure limits specifically listed; risk assessments encourage use of best-practices for industrial chemicals.
Environmental Regulation: No federal environmental release monitoring requirements presently documented.
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