Product Name: Dibutyl Maleate
Chemical Formula: C12H20O4
CAS Number: 105-76-0
Synonyms: Maleic acid, dibutyl ester
Recommended Use: Plasticizer, intermediate for resins and polymers, component in adhesives and coatings
Supplier Information: Provided upon request, typically includes manufacturer’s contact phone and emergency phone number.
Emergency Overview: Colorless to pale yellow liquid with a mild odor, commonly handled in industrial and laboratory settings.
Hazard Classification: Harmful if swallowed, causes skin and eye irritation, may cause respiratory irritation
GHS Label Elements: Signal word: Warning; Hazard pictograms: Exclamation mark
Potential Health Effects: Exposure can result in skin redness, itching, or rash; inhaling vapors may cause dizziness, headache, or throat irritation; liquid contact irritates eyes; accidental ingestion can lead to abdominal discomfort.
Environmental Hazards: Spills may cause harm to aquatic life, not readily biodegradable in water sources, avoid release to environment.
Chemical Name: Dibutyl Maleate
Concentration: 99% or higher
Impurities: Minor levels of maleic acid and butanol derivatives may be present
Substance Type: Pure organic compound
Molecular Weight: 228.29 g/mol
Other Ingredients: None in significant amounts affecting classification.
Inhalation: Move person to fresh air, support breathing if necessary, seek medical attention if symptoms persist
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, consult healthcare if irritation develops
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy to do; continue rinsing, consult a physician
Ingestion: Rinse mouth, do not induce vomiting, never give anything by mouth to an unconscious person, seek medical advice
General Advice: Assistance from trained healthcare professionals is recommended for significant exposures.
Extinguishing Media: Use dry chemical, foam, carbon dioxide, or water spray; avoid high-pressure water streams
Special Hazards: Combustion generates carbon monoxide, carbon dioxide, and possible irritating fumes
Protective Equipment: Firefighters wear self-contained breathing apparatus and full protective clothing
Specific Methods: Cool exposed containers with water mist, prevent runoff from entering drains, contain firewater if possible.
Flammability: Slightly combustible liquid, avoid ignition sources.
Personal Precautions: Wear gloves, eye protection, and respiratory protection, ventilate area
Environmental Precautions: Prevent entry to sewers, soil, or waterways; report spills as required by local regulations
Containment Procedures: Dike area of spill, absorb with inert material such as sand or vermiculite
Clean-Up Methods: Collect absorbed material into suitable containers for disposal; wash area thoroughly with water and detergent after cleanup is complete.
Emergency Procedures: Isolate spill area, prevent untrained persons from entering.
Handling: Avoid breathing vapors, prevent contact with skin and eyes, use only in well-ventilated areas or under fume hoods, keep containers tightly closed
Hygiene Practices: Wash hands after handling, do not eat, drink, or smoke while using this substance, remove contaminated clothing and wash before reuse
Storage Conditions: Store in a cool, dry, well-ventilated location, protect from direct sunlight, keep away from sources of ignition, incompatible materials, and moisture
Incompatibilities: Strong oxidizers, strong acids, and alkalis may cause hazardous reactions with this compound
Packaging Materials: Store in original or compatible chemical containers to prevent leaks or contamination.
Exposure Limits: No specific occupational exposure limits established for dibutyl maleate, general ventilation recommended
Engineering Controls: Utilize local exhaust, process enclosures, or other controls to maintain airborne concentrations below recommended limits
Personal Protective Equipment (PPE): Use chemical-resistant gloves, safety goggles or face shield, and appropriate protective clothing
Respiratory Protection: If vapor or aerosol generation is likely, use a respirator suitable for organic vapors
Environmental Controls: Prevent further leakage or spillage, dispose of in compliance with regulations.
Appearance: Clear to pale yellow liquid
Odor: Mild, characteristic ester odor
Odor Threshold: Not determined
pH: Not applicable
Melting Point: -85°C
Boiling Point: 281°C at 101.3 kPa
Flash Point: 151°C (closed cup)
Auto-ignition Temperature: 400°C
Explosion Limits: Not established
Vapor Pressure: 0.007 mm Hg at 20°C
Solubility: Insoluble in water; miscible with common organic solvents like alcohol and ether
Density: 1.05 g/cm³ at 20°C
Viscosity: 7.0 mPa·s at 25°C
Partition Coefficient (log Kow): 3.5
Evaporation Rate: Not established.
Stability: Stable under recommended storage and handling conditions
Conditions to Avoid: Exposure to excessive heat, open flames, or moisture
Materials to Avoid: Strong oxidizing agents, acids, bases
Hazardous Decomposition Products: Carbon oxides, possible acrid smoke and irritating vapors in fire
Polymerization: Not prone to hazardous polymerization under normal conditions.
Reactivity: No hazardous reactions anticipated under normal processing and storage practices.
Acute Toxicity: Oral LD50 (rat) estimated at 4,100 mg/kg; low dermal toxicity reported
Inhalation Hazard: Vapors may irritate respiratory tract, high concentrations could depress central nervous system
Skin Contact: May cause irritation or allergic dermatitis in sensitive individuals
Eye Contact: Causes significant irritation, possible redness, and tearing
Sensitization: No significant reports of sensitization in humans
Chronic Effects: Prolonged or repeated exposures may cause dryness, cracking or even defatting of skin
Mutagenicity/Carcinogenicity: Not classified as carcinogenic, mutagenic studies show negative or inconclusive results
Reproductive Toxicity: No known adverse effects on reproductive health at typical occupational exposures.
Ecotoxicity: Harmful to aquatic life with long-lasting effects, fish and aquatic invertebrates show moderate sensitivity
Persistence and Degradability: Not readily biodegradable, tends to persist in soil and sediments
Bioaccumulation Potential: Potential for bioaccumulation due to moderate partition coefficient (log Kow)
Mobility in Soil: Expected to have low mobility in most soil types due to hydrophobic characteristics
Other Adverse Effects: Large releases can cause oxygen depletion in water and impact aquatic systems.
Recommendations: Avoid uncontrolled environmental release, follow best practices for containment and disposal.
Disposal Methods: Incinerate in a permitted facility or dispose of according to local, regional, or national regulations
Unused Product: Treat as chemical waste, never pour down the drain, follow hazardous waste disposal requirements
Contaminated Packaging: Triple rinse and offer for recycling or disposal as allowed by regulations
Environmental Precautions: Do not allow material to reach soil, sewers, or any watercourses.
Waste Code: Consult local regulations for appropriate chemical waste code and procedures.
UN Number: Not regulated for transport by road, rail, sea, or air in most jurisdictions
Proper Shipping Name: Dibutyl Maleate
Hazard Class: Not classified as dangerous for transport
Packing Group: Not applicable
Marine Pollutant: No
Special Transport Precautions: Avoid rough handling and extreme temperatures, secure containers tightly
Transport Labels: Standard chemical, not requiring special hazard labelling based on available data.
Transport Requirements: Follow standard regulations for non-dangerous goods.
Global Inventories: Listed on major chemical inventories including TSCA (United States), EINECS/ELINCS (Europe), DSL (Canada), IECSC (China)
OSHA: Not considered hazardous under OSHA Hazard Communication Standard
SARA Title III: Not subject to reporting under Sections 302, 304, 313
WHMIS Classification: Classified as D2B, toxic material causing other toxic effects in Canada
REACH Status: Registered substance in the European Union, subject to safety data requirements
Other Regulations: Not listed as a known or probable carcinogen by NTP, IARC, or OSHA.
Labelling Requirements: Follow local rules for workplace chemicals, always use approved hazard statements and pictograms.
