Product Name: 4-Tert-Butylcatechol
Synonyms: 4-tert-Butyl-1,2-benzenediol, TBC
Chemical Formula: C10H14O2
Molecular Weight: 166.22 g/mol
CAS Number: 98-29-3
Recommended Use: Polymerization inhibitor, stabilizer for reactive chemicals
Manufacturer Contact: Chemical supplier emergency hotline, business address, email, and phone
GHS Classification: Acute Toxicity Category 4 (Oral, Dermal), Eye Emission Category 2A, Skin Irritation Category 2
Signal Word: Warning
Hazard Statements: Harmful if swallowed or absorbed through skin, causes skin and serious eye irritation, may cause respiratory irritation
Pictograms: Exclamation mark, health hazard
Precautionary Statements: Avoid breathing dust. Wash hands thoroughly after handling. Do not eat, drink, or smoke when using the product. Wear protective gloves, clothing, and eye protection.
Chemical Name: 4-Tert-Butylcatechol
Concentration: ≥99%
Impurities: Trace amounts of hydroquinone, tert-butylphenol, minimal solvents depending on manufacturing process
Additives: No significant stabilizing agents or preservatives indicated in standard material
Inhalation: Move person to fresh air. Monitor breathing; give oxygen if available and needed. Seek medical attention if symptoms persist.
Skin Contact: Wash thoroughly with soap and water for several minutes. Remove contaminated clothing. Do not reuse until cleaned.
Eye Contact: Rinse cautiously with water for several minutes, keeping eyelids open. Remove contact lenses if present and easy to do.
Ingestion: Rinse mouth; do not induce vomiting. Seek medical help promptly.
Notes for Healthcare Providers: Symptomatic treatment; respiratory distress or signs of irritation require observation.
Suitable Extinguishing Media: Water spray, foam, dry chemical, or carbon dioxide.
Unsuitable Extinguishing Media: Direct water stream can spread burning powder.
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, irritating fumes
Special Protective Equipment for Firefighters: Self-contained breathing apparatus and full protective clothing
Fire and Explosion Hazards: Dust accumulation can create a fire risk. Runoff can pose environmental hazards.
Personal Precautions: Wear respiratory protection and avoid dust generation.
Environmental Precautions: Block entry into waterways or drains. Collect spillage swiftly.
Methods for Cleanup: Sweep up spilled material and place in tightly closed containers. Remove with inert absorbent material if necessary.
Decontamination: Wash area with copious amounts of water; avoid skin contact.
Handling: Use only with adequate ventilation. Avoid creating dust or inhaling vapors. Wash hands after contact. Employ local exhaust for dusty operations.
Storage: Store in cool, dry, well-ventilated place. Keep container tightly closed. Prevent exposure to heat and direct sunlight. Segregate from oxidizing agents, acids, or bases.
Occupational Exposure Limits: No specific established workplace limits for this compound; refer to nuisance dust limits (OSHA PEL for particulates: 15 mg/m³ TWA total dust, 5 mg/m³ TWA respirable fraction).
Engineering Controls: Local exhaust ventilation, closed handling systems, process enclosures recommended.
Personal Protective Equipment: Safety goggles or face shield, chemical-resistant gloves (nitrile, neoprene), lab coat or coveralls, approved respirators for dusty environments.
Hygiene Measures: Do not eat or smoke in areas where product is used. Wash thoroughly after handling.
Appearance: White to slightly off-white crystalline solid
Odor: Mild phenolic
pH: Not available (sparingly soluble in water)
Melting Point: 52-55°C
Boiling Point: 280°C
Flash Point: 145°C (open cup)
Explosive Limits: No data
Vapor Pressure: Low at room temperature
Solubility: Slightly soluble in water; soluble in ethanol, ether, and organic solvents
Partition Coefficient (log Pow): 2.83
Density: 1.07 g/cm³
Chemical Stability: Stable at recommended storage temperatures and conditions.
Reactivity: Reacts with strong oxidizers, acids, and bases.
Hazardous Reactions: Can undergo polymerization or oxidation if contaminated or heated.
Hazardous Decomposition: May produce hazardous carbon oxides, tarry residue upon combustion or decomposition.
Incompatible Materials: Strong acids, strong bases, oxidizing agents.
Acute Toxicity: Oral LD50 (rat): 815 mg/kg, Dermal LD50 (rabbit): 1200 mg/kg
Irritation: Causes skin and eye irritation in animal studies
Chronic Effects: Prolonged exposure may lead to dermatitis, respiratory tract irritation
Mutagenicity: Data does not show clear evidence in standard tests
Carcinogenicity: Not listed by IARC, NTP, OSHA as carcinogenic
Routes of Exposure: Inhalation, skin, and eye contact, ingestion
Aquatic Toxicity: LC50 (Fish, 96 hr): 10-25 mg/L, EC50 (Daphnia, 48 hr): 5 mg/L
Persistence and Degradability: Expected to biodegrade slowly in soil and water
Bioaccumulation Potential: Moderate, based on partition coefficient
Mobility in Soil: Limited; binds to organic matter
Product Disposal: Treat as hazardous waste. Follow local, regional, national regulations for chemical disposal. Do not discharge into drains or natural waterways.
Container Disposal: Triple rinse empty containers and puncture before disposal or recycling. Label containers correctly.
Methods for Disposal: Incineration by licensed chemical disposal company preferred; avoid landfill unless permitted by regulations.
UN Number: UN3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (contains 4-tert-butylcatechol)
Transport Hazard Class: 9 (Miscellaneous dangerous substances)
Packing Group: III
Marine Pollutant: Yes
Special Precautions: Segregate from incompatible materials; avoid environmental release during transport
EPA: Listed as a hazardous substance under CERCLA (reportable quantities may apply)
TSCA: Appears in the US Toxic Substances Control Act inventory
REACH: Registered under EU chemical regulations; requires safety assessment
OSHA: No specific standard; general chemical safety standards apply
Labeling: Follows GHS/OSHA Hazard Communication Standard; requires safety labels and hazard statements on packaging
SARA Title III: Subject to reporting under Tier II inventory in the US
International: Registered or notified in several jurisdictions worldwide, including Canada, Japan, Korea, and Australia
