Product Name: 2,6-Di-Tert-Butyl-1,4-Benzoquinone
Chemical Formula: C14H20O2
Synonyms: DTBBQ, 2,6-Di-tert-butyl-p-benzoquinone, 2,6-Bis(1,1-dimethylethyl)-1,4-benzoquinone
CAS Number: 719-22-2
Recommended Use: Laboratory reagent, intermediate for organic synthesis, antioxidant research
Manufacturer/Supplier: Contact relevant distributor or chemical supplier for details
Emergency Contact: Refer to regional poison control center or emergency services for immediate advice
Restrictions on Use: Not for drug, food, or household use
Physical Appearance: Yellow crystalline powder
GHS Classification: Acute Toxicity (oral, dermal, inhalation), Skin and Eye Irritation, Specific Target Organ Toxicity
Pictograms: Exclamation mark, Health hazard symbol present on containers
Signal Word: Warning
Hazard Statements: May cause skin and eye irritation, harmful if swallowed, dust and vapors cause respiratory irritation
Precautionary Statements: Avoid breathing dust/fume/gas/mist/vapors, wear protective gloves/protective clothing/eye protection/face protection, wash hands thoroughly after handling
Hazard Routes: Inhalation, ingestion, skin and eye contact
Health Effects: Prolonged exposure can lead to dizziness, headaches, contact dermatitis, respiratory issues
Fire/Explosion Hazards: Flammable powder–may form explosive dust-air mixtures
Environmental Hazards: Toxic to aquatic life with long-lasting effects
Chemical Name: 2,6-Di-Tert-Butyl-1,4-Benzoquinone
Common Name: DTBBQ
Synonym(s): 2,6-Di-tert-butyl-p-benzoquinone
CAS Number: 719-22-2
EC Number: 210-614-8
Concentration: 100% (pure substance)
Impurities/Stabilizers: No significant impurities relevant for hazard classification
Molecular Weight: 220.31 g/mol
General Advice: Move victim away from exposure, observe for symptoms
Inhalation: Transfer to fresh air, seek immediate medical attention if breathing becomes difficult, monitor for respiratory distress
Skin Contact: Remove contaminated clothing and rinse skin with plenty of water for at least 15 minutes, do not reuse clothing until thoroughly cleaned
Eye Contact: Rinse slowly and gently with water for at least 15 minutes, lift eyelids to ensure thorough flushing, seek immediate medical advice
Ingestion: Rinse mouth with water, do not induce vomiting, seek medical attention immediately, provide hospital with product label if possible
Self-Protection for First Aiders: Use gloves and protective gear to avoid exposure during assistance
Symptoms Delayed: Effects on the respiratory system and skin may not be immediately apparent, monitor continually
Suitable Extinguishing Media: Foam, dry chemical, CO2, water spray–avoid direct water jets to prevent scattering powder
Unsuitable Extinguishing Media: Strong streams of water, as they can spread the material
Specific Hazards Arising from the Chemical: Emits toxic fumes of carbon monoxide, carbon dioxide on combustion
Protective Equipment for Firefighters: Wear full fire-fighting turn-out gear and self-contained breathing apparatus
Special Fire-Fighting Procedures: Prevent runoff from entering waterways, isolate fire from sources of ignition, keep unopened containers cool by spraying with water
Combustion Products: Toxic, irritating vapors such as carbon oxides, avoid inhalation
Personal Precautions: Keep unprotected persons away, ventilate area, use appropriate respiratory protection, gloves, and goggles
Environmental Precautions: Avoid discharge into drains, waterways, soils, alert proper authorities in case of large spill
Spill Cleanup Methods: Carefully sweep or vacuum spill, place in labeled, sealed containers for disposal, clean area with water and detergent, avoid dust generation
Prevention of Secondary Hazards: Remove all sources of ignition, clean up spillage promptly to avoid environmental contamination, keep waste isolated
Handling: Use chemical fume hood, minimize dust generation, avoid inhalation and contact with skin, wash hands thoroughly after use, do not eat, drink, or smoke during handling
Storage: Store in cool, well-ventilated area away from sunlight, ignition sources, and incompatible substances such as strong oxidizers or reducing agents, keep tightly closed in original container
Incompatibilities: Avoid acids, bases, oxidizers that could destabilize the compound
Specific Requirements: Use non-sparking tools, ground/bond container and receiving equipment to prevent static discharge
Special Precautions: Limit quantities stored, control access to authorized personnel
Engineering Controls: Provide local exhaust ventilation or fume hood, maintain eye wash and emergency shower stations in proximity
Occupational Exposure Limits: No US OSHA PEL established; consult local guidelines
Respiratory Protection: Use NIOSH-approved respirator for dust, especially if ventilation is inadequate
Skin Protection: Wear chemical-resistant gloves (e.g., nitrile), lab coat, and protective sleeves if risk of contact exists
Eye Protection: Safety goggles or face shield to prevent dust or splashes contacting eyes
Hygiene Measures: Remove contaminated clothing immediately, launder before reuse, wash hands before eating, drinking, or smoking
Environmental Controls: Prevent release to environment using containment systems
Appearance: Yellow crystalline solid
Odor: Slight aromatic odor
Odor Threshold: Data not available
pH: Not applicable (solid form)
Melting Point: 128–132°C
Boiling Point: Decomposes before boiling
Flash Point: >110°C (closed cup)
Evaporation Rate: Data not available
Flammability: Combustible, dust can form explosive mixtures
Vapor Pressure: Negligible at room temperature
Vapor Density: Not determined
Relative Density: ~1.06 g/cm³
Solubility: Soluble in organic solvents (e.g., acetone, chloroform, ether); insoluble in water
Partition Coefficient (n-octanol/water): Data not available
Auto-Ignition Temperature: Not determined
Decomposition Temperature: Decomposes at elevated temperatures
Viscosity: Not applicable (solid)
Chemical Stability: Stable under recommended storage conditions, breaks down with excessive heat, exposure to light or oxidizing/reducing agents
Reactivity: Can react vigorously with strong acids, bases, oxidizers, and reducing agents
Hazardous Reactions: No hazardous polymerization anticipated with proper handling
Conditions to Avoid: High temperatures, open flames, direct sunlight, exposure to air and moisture
Incompatible Materials: Strong oxidizers, bases, acids, strong reducing agents
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, various organic fumes under fire conditions
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Oral LD50 (rat): >2,500 mg/kg (estimated); data for dermal/inhalation limited
Skin Corrosion/Irritation: Causes moderate irritation on repeated or extended contact
Eye Damage/Irritation: Can cause eye redness, soreness, tearing, blurred vision
Respiratory Effects: Dust/fumes may cause cough, throat irritation, headache, drowsiness
Ingestion Effects: May cause abdominal discomfort, nausea, vomiting, diarrhea
Sensitization: Not classified as sensitizer, though repeated exposure may increase sensitivity
Chronic Effects: Potential for liver, kidney, or central nervous system effects under high, prolonged exposure, no carcinogenicity reported
Mutagenicity/Carcinogenicity: No evidence found through current testing; not listed by IARC, NTP, or OSHA
Reproductive Toxicity: No testing data indicating reproductive risk
Target Organ Effects: Possible liver, kidney, central nervous system, skin, and respiratory system targets with heavy exposure
Ecotoxicity: Harmful to aquatic life; may cause long-term adverse effects in the aquatic environment
Aquatic Toxicity: Limited data available, but structure indicates probable toxicity to fish, invertebrates, and algae
Persistence and Degradability: Compound expected to persist in soil and water due to stability of aromatic ring, slow to degrade biologically
Bioaccumulation Potential: Likely to accumulate in aquatic organisms; log Kow not fully determined
Mobility in Soil: Low solubility reduces migration in soil, but spillage may contaminate surface waters
Other Adverse Effects: Ecological impact increases with higher volume spills, notify regulating agencies if environmental release occurs
Waste Treatment Methods: Collect and place waste in appropriate, closed containers labeled for hazardous waste; avoid generating dust during handling
Disposal of Product: Send to licensed chemical waste facility or incinerate according to local, state, and federal regulations
Disposal of Packaging: Triple rinse empty containers before disposal; puncture and dispose of in compliance with government regulations
Precautions for Disposal: Prevent contamination of soil, water, and sewer systems; staff handling disposal should use gloves, eye protection, and chemical-resistant clothing
Local Disposal Restrictions: Consult environmental agencies for country/state-specific requirements for benzoquinones and their derivatives
UN Number: Not regulated for transport under most international regulations; verify with all carriers
UN Proper Shipping Name: Not classified as hazardous for ground, air, or sea shipment unless local/regional restrictions apply
Transport Hazard Class: Not currently assigned a class; check for updates and local rules
Packing Group: No specific group assigned
Environmental Hazards: Marine pollutant only in bulk quantity; avoid cargo loading with foodstuffs
Special Precautions for Transport: Use tightly sealed containers, keep dry, maintain documentation of transport conditions
Regulatory Notes: Ensure documentation reflects up-to-date hazard communication as required by recipient council and country
US Regulatory Status: Not specifically listed under CERCLA, RCRA, EPCRA, SARA Title III
Canada: Listed on the Domestic Substances List (DSL); may require workplace labeling as hazardous substance
Europe (REACH/CLP): Not classified under REACH as of latest ECHA updates, supplier must verify compliance
Labeling Requirements: GHS-compliant signal word, hazard, precautionary, and storage statements on all containers
Inventory Status: Present on TSCA, DSL, EINECS/ELINCS inventories
Workplace Safety Rules: Employers must provide safety training, access to SDS, and equipment necessary for safe handling
Other Country-Specific Rules: Consult national chemical control agencies for any recent changes or additional rules in your jurisdiction
