Product Name: 2,5-Dimethoxy-1,4-Benzoquinone
Chemical Formula: C8H8O4
Synonyms: DMQ, Benzoquinone, 2,5-dimethoxy-
CAS Number: 3150-20-5
Manufacturer: Contact chemical supplier or distributor for specific company details
Recommended Use: Research, chemical synthesis, laboratory reagent
Restrictions on Use: Not for drug, food, or household purposes
GHS Classification: Eye Irritant (Category 2A), Skin Irritant (Category 2), Acute Toxicity (Oral Category 4)
Signal Word: Warning
Hazard Statements: Harmful if swallowed. Causes skin irritation. Causes serious eye irritation.
Pictograms: Exclamation mark
Precautionary Statements: Avoid breathing dust/fume/gas/mist/vapors/spray. Wash hands thoroughly after handling. Wear protective gloves, protective clothing, eye protection, face protection.
Potential Health Effects: Inhalation may result in respiratory tract irritation. Ingestion may bring abdominal discomfort or nausea. Contact with skin can cause redness or irritation, prolonged exposure aggravates symptoms. Eye exposure creates pain, redness, watering, and potentially blurred vision.
Chemical Name: 2,5-Dimethoxy-1,4-benzoquinone
Common Name/Synonyms: DMQ
CAS Number: 3150-20-5
Concentration: ≥98% by weight
Impurities and Stabilizing Additives: Methylated benzoquinones at trace levels possible (typically <2%)
Molecular Weight: 168.15 g/mol
Eye Contact: Rinse cautiously with clean water for at least fifteen minutes. Remove contact lenses if present and easy to do. Seek medical attention.
Skin Contact: Immediately remove contaminated clothing. Wash affected skin with plenty of soap and water. If irritation persists, seek medical advice.
Inhalation: Move person outdoors into fresh air. Keep comfortable for breathing. Provide oxygen if breathing becomes difficult. Get medical assistance if symptoms occur.
Ingestion: Do not induce vomiting. Rinse mouth with water. Drink water unless not fully conscious. Seek immediate medical advice.
Most Important Symptoms: Irritation, burning sensation, difficulty breathing, coughing, abdominal discomfort.
Immediate Medical Attention and Special Treatment Needed: Symptomatic treatment recommended; monitor for delayed effects following exposure.
Suitable Extinguishing Media: Use water spray, alcohol-resistant foam, dry chemical, or carbon dioxide.
Unsuitable Extinguishing Media: Strong water jets may spread material.
Specific Hazards: May produce irritating or toxic fumes (carbon oxides, methoxy compounds) during combustion.
Protective Equipment: Firefighters use self-contained breathing apparatus and full protective gear.
Advice for Firefighters: Evacuate immediate area, fight fire from safe distance, prevent runoff from entering water systems.
Personal Precautions: Evacuate area if necessary. Avoid dust generation and inhalation. Use gloves, lab coat, safety goggles, dust mask.
Environmental Precautions: Prevent spillage from reaching drains, waterways, and soil.
Methods for Containment: Cover spills with absorbent, chemical-inert material (vermiculite, sand, earth).
Cleanup Procedures: Shovel collected material into properly labeled container. Ventilate area and wash surfaces with soap and water.
Disposal: Dispose according to regional regulations—see disposal section for details.
Safe Handling Guidelines: Minimize exposure through direct contact or inhalation. Wash hands immediately after handling. Do not eat, drink, or smoke in work area.
Technical Measures: Access only for trained personnel. Use non-sparking tools and proper grounding.
Handling Precautions: Work in well-ventilated area or under chemical fume hood. Avoid dust formation. Wear recommended personal protective equipment.
Storage Requirements: Store tightly sealed in original container. Place container in a cool, dry, and well-ventilated cupboard away from incompatible materials including strong bases, reducing agents, and oxidizers. Protect from direct sunlight and moisture.
Packaging Materials: Glass, high-density polyethylene, or compatible chemical-resistant material.
Control Parameters: No established occupational exposure limits (OSHA, ACGIH).
Engineering Controls: Local exhaust ventilation, fume hood recommended.
Personal Protective Equipment: Nitrile or neoprene gloves, safety goggles or face shield, lab coat or chemical apron, certified dust respirator (N95 or higher) if powder is airborne.
Hygiene Measures: Wash hands and face after exposure, change contaminated clothing immediately. Shower at end of shift.
Other Protection: Eye-wash station and safety shower should be accessible in area of use.
Environmental Exposure Controls: Prevent product from entering drains. Monitor air for dust or vapors.
Physical State: Solid
Appearance: Yellow or orange crystalline powder
Odor: Mild, slightly quinone-like
pH: Not applicable (insoluble in water)
Melting Point: 114–118°C
Boiling Point: Decomposes before boiling
Flash Point: Not determined; likely nonflammable
Flammability: Not classified as flammable
Vapor Pressure: Negligible at room temperature
Solubility: Poorly soluble in water; soluble in organic solvents (ethanol, methanol, acetone, ether)
Density: About 1.38 g/cm3
Partition Coefficient (n-octanol/water): Not available
Auto-ignition Temperature: Not determined
Decomposition Temperature: Decomposes at temperatures above melting
Chemical Stability: Stable under recommended handling and storage conditions.
Reactive Properties: May react with strong oxidizers, strong bases, reducing agents.
Conditions to Avoid: Heat, flames, sparks, direct sunlight, moisture.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, formaldehyde, methoxy derivatives
Polymerization: Not expected to occur.
Incompatibilities: Avoid contact with strong alkalis, reducing and oxidizing substances.
Acute Toxicity: Data on oral toxicity (LD50) not widely studied but estimated moderate toxicity. Harmful if swallowed.
Skin Corrosion/Irritation: Expected to cause irritation, redness, dermatitis with repeated exposure.
Eye Damage/Irritation: Causes irritation, may lead to pain or watering.
Respiratory Sensitization: No data on sensitizing potential.
Skin Sensitization: Prolonged or repeated contact may produce irritation.
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA.
Reproductive Toxicity: No data available.
Mutagenicity: No conclusive data.
Other Information: No chronic exposure data available—exercise caution.
Ecotoxicity: Data limited, anticipated to be moderately hazardous to aquatic organisms due to high organic content and low volatility.
Persistence and Degradability: Not readily biodegradable, may persist in the environment.
Bioaccumulative Potential: Potential for accumulation in aquatic species is not well studied.
Mobility in Soil: Low mobility due to low solubility in water.
Other Adverse Effects: Degradation products may increase toxicity for aquatic life; avoid releases to waterways.
Disposal Methods: Use licensed hazardous chemical disposal facility. Contaminated packaging and residues treated as chemical waste. Incineration preferred.
Special Precautions: Do not dispose with household waste. Do not allow to enter sewage or water systems.
Waste Code: Assign according to local, regional, national regulations.
Packaging Disposal: Decontaminate and recycle or dispose safely, as regulated for hazardous waste.
UN Number: Not assigned
UN Proper Shipping Name: Non-regulated chemical
Transport Hazard Class: Not classified
Packing Group: Not assigned
Environmental Hazards: Dispose responsibly; not regulated for transport as marine pollutant
Transport in Bulk: Not regulated
Special Transport Precautions: Ensure container integrity and proper labeling during transport; avoid rough handling.
OSHA: Not specifically regulated as hazardous.
SARA Title III Section 313: Not listed.
TSCA: Listed.
DSL/NDSL (Canada): Check with supplier; not always listed.
EU Regulation: Not classified for CLP regulation.
Other Regulations: User responsible for compliance with local, state, national, and international regulations on chemical storage, use, and disposal.
