Chemical Name: 2-Tert-Butyl-1,4-Benzoquinone
Synonyms: Tert-Butyl-p-benzoquinone, TBQ
Chemical Formula: C10H12O2
Molecular Weight: 164.2 g/mol
CAS Number: 98-29-3
Product Use: Laboratory reagent, organic synthesis intermediate
Manufacturer: Not specified
Emergency Contact: Refer to local poison control or safety authority
GHS Classification: Acute toxicity (oral), harmful if swallowed; Skin irritation, causes skin irritation; Serious eye damage/irritation, causes serious eye irritation; Specific Target Organ Toxicity, single exposure
Signal Word: Warning
Hazard Statements: May cause respiratory, skin, and eye irritation; Harmful if swallowed or inhaled
Pictograms: Exclamation Mark
Precautionary Statements: Wear protective gear; Wash exposed skin thoroughly; Do not eat, drink, or smoke when handling; Avoid breathing dust, vapor, or mist; Use only outdoors or in a well-ventilated area; If on skin, wash with plenty of water; If in eyes, rinse cautiously for several minutes
Chemical: 2-Tert-Butyl-1,4-Benzoquinone
Concentration: >98% by weight
Impurities: Low-level by-products from synthesis, no significant hazard reported for impurities at typical concentrations in commercial product
Additives: None reported
Eye Contact: Rinse eyes with plenty of water for at least 15 minutes, lifting eyelids to ensure full cleansing; seek medical attention immediately
Skin Contact: Remove contaminated clothing; wash skin thoroughly with soap and water; seek medical advice if irritation or symptoms persist
Inhalation: Move individual to fresh air; keep airway clear; administer artificial respiration or oxygen if not breathing; get immediate medical assistance
Ingestion: If swallowed and person is conscious, rinse mouth with water; do not induce vomiting unless directed by medical personnel; contact medical emergency services without delay
Symptoms: May include burning, itching, coughing, shortness of breath, and gastrointestinal upset
Suitable Extinguishing Media: Dry chemical, CO2, foam, water spray
Unsuitable Extinguishing Media: Strong water jet, which can spread chemical
Special Hazards: Will emit toxic fumes under fire conditions, including carbon monoxide, carbon dioxide, and organic vapors
Protective Equipment: Firefighters need self-contained breathing apparatus (SCBA), full body protective clothing
Additional Recommendations: Keep combustibles away from fire area; fight fire from upwind to avoid hazardous fumes; cool containers with water spray to prevent overheating
Personal Precautions: Use chemical-resistant gloves, splash goggles, chemical-resistant clothing; avoid dust formation and inhalation; evacuate unnecessary personnel
Environmental Precautions: Prevent runoff into drains, sewers, or waterways; dike spill area with inert materials such as sand or vermiculite
Cleanup Procedures: Collect spilled material using non-sparking, inert tools; place material in properly labeled chemical waste container; ventilate area; decontaminate surfaces with water and detergent; avoid raising dust when cleaning
Handling: Avoid all unnecessary exposure; use only in well-ventilated areas; keep containers tightly closed; do not breathe dust, fumes, or vapors; wash hands and face before breaks and immediately after handling substance
Storage: Store in original containers in a cool, dry, well-ventilated place away from direct sunlight, oxidizers, and sources of ignition; store at room temperature or below; do not store with acids, bases, or strong reducing agents; keep away from incompatible substances, such as peroxides or strong alkalis
Exposure Limits: No specific occupational exposure limit established; handle with caution and treat as potentially hazardous
Engineering Controls: Use fume hood or adequate local exhaust ventilation to minimize airborne concentrations; ensure eyewash stations and safety showers are nearby
Personal Protective Equipment (PPE): Safety goggles or face shield; lab coat or protective clothing; impervious gloves (nitrile, neoprene, or equivalent); in case of insufficient ventilation, use NIOSH-approved organic vapor respirator
Hygiene Measures: Change contaminated clothing promptly; wash hands, forearms, and face after handling; avoid eating, drinking, or smoking in work area; keep product off skin and out of eyes
Appearance: Yellow to orange crystalline powder
Odor: Characteristic pungent, quinone-like odor
Odor Threshold: Not determined
pH: Not applicable (insoluble in water)
Melting Point: 71-74 °C
Boiling Point: Decomposes before boiling
Flash Point: >110 °C (closed cup)
Evaporation Rate: Not determined
Flammability: May burn if strongly heated
Vapor Pressure: Very low at room temperature
Vapor Density: Not determined
Relative Density: About 1.18 (water = 1)
Solubility: Practically insoluble in water; soluble in organic solvents like ether, acetone, benzene
Partition Coefficient (n-octanol/water): Not established
Auto-Ignition Temperature: Not tested
Decomposition Temperature: Decomposes with heat
Viscosity: Not applicable (solid)
Chemical Stability: Remains stable under standard conditions; breaks down on exposure to light or high temperature
Conditions to Avoid: Elevated temperatures, direct sunlight, moisture, and incompatible materials
Incompatible Materials: Strong alkali, strong acids, reducing agents, oxidizers, reactive metals
Hazardous Decomposition Products: Burning or decomposition releases toxic gases, including carbon monoxide, carbon dioxide, and irritating organic vapors
Possibility of Hazardous Reactions: No hazardous polymerization anticipated in normal use
Routes of Exposure: Skin contact, ingestion, inhalation, eye contact
Acute Effects: Harmful if swallowed; irritating to eyes, skin, and respiratory tract; may cause redness, swelling, coughing, or gastrointestinal symptoms after ingestion
Chronic Effects: No long-term studies in humans documented; laboratory animals exposed to quinones sometimes show liver or kidney effects after repeated high doses
LD50 (Oral, Rat): 342 mg/kg
Sensitization: No known sensitizing properties, but repeated contact may increase risk
Carcinogenicity / Mutagenicity / Reproductive Toxicity: No clear data; not classifiable as carcinogen by ACGIH, IARC, or OSHA
Target Organs: Eyes, skin, mucous membranes, gastrointestinal tract
Ecotoxicity: Toxic to aquatic organisms at high concentrations; no precise EC50 or LC50 values available
Persistence and Degradability: May persist in environment under certain conditions; some breakdown expected via microbial activity
Bioaccumulative Potential: Potential for bioaccumulation not fully evaluated, but unlikely given chemical structure
Mobility in Soil: Low solubility in water limits migration; most likely remains in topsoil or sediments
Other Adverse Effects: Avoid release to the environment; material not expected to contribute substantially to air pollution
Disposal Methods: Incinerate in approved chemical incinerator following local, regional, and national regulations; avoid releasing into drains or areas leading to open water
Container Disposal: Rinse empty containers thoroughly; dispose of rinsate and container as hazardous waste
Precautions: Use PPE and avoid contaminating soil or water during disposal; keep records of quantity and method used in waste management
Waste Codes: Not specifically assigned, but treat as hazardous laboratory waste under most regulatory codes
UN Number: 3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (contains 2-Tert-Butyl-1,4-Benzoquinone)
Transport Hazard Class: 9 (Miscellaneous Dangerous Substances)
Packing Group: III
Labels: Miscellaneous hazard
Special Precautions: Do not allow material to be released from packages during transport; keep away from foodstuffs during carriage
Environmental Hazards: Notify authorities if a large spill occurs in transit
TSCA (Toxic Substances Control Act): Listed
REACH (EU): Requires registration, may be subject to supply chain safety obligations
OSHA Hazards: Target organ effect, harmful by ingestion, irritant
WHMIS Classification: D2B (Toxic, irritant material)
California Proposition 65: Not listed as a carcinogen or reproductive toxicant
Other National/International Lists: Satisfies major international regulatory frameworks but users must check local rules and safety requirements for handling and disposal
