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Chemical Name: Dibutyl Phthalate
Common Names: DBP
Appearance: Clear, oily liquid without strong odor
Uses: Used as a plasticizer for plastics and resins, sometimes showing up in adhesives and printing inks. Inproduct formulations, DBP often helps with flexibility and processability, but health and environmental concerns have drawn a lot of regulatory scrutiny over the past two decades.
Hazard Class: Classified as harmful if swallowed or absorbed through skin
Health Risks: Linked to reproductive toxicity, can impact male fertility, also associated with respiratory irritation, nausea, and eye or skin contact reactions
Flammability: Considered combustible, can release irritating or toxic fumes in a fire
Key Physical Dangers: Slippery spill risk, persistent on surfaces, strong affinity for organic materials
Main Ingredient: Pure dibutyl phthalate (usually above 98% concentration in bulk chemical drums)
Chemical Formula: C16H22O4
Molecular Weight: 278.35 g/mol
Impurities: Other phthalates may trace contaminants, but strict limits apply for industrial use standards
Eye Contact: Flush with clean water for 15 minutes, hold eyelids open, seek medical advice if irritation persists
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing
Inhalation: Move to fresh air, monitor for breathing difficulties
Ingestion: Do not induce vomiting, contact poison control or physician immediately
Suitable Extinguishing Media: Foam, carbon dioxide, dry chemical
Combustion Hazards: Can produce carbon monoxide, carbon dioxide, and phthalic anhydride fumes
Protective Equipment: Standard firefighters’ gear and self-contained breathing apparatus advised
Fire Risk: Ignites more easily at elevated temperatures, pools of liquid can spread fire quickly if unchecked
Personal Precautions: Wear protective gloves, goggles, and chemical-resistant boots
Environmental Precautions: Keep from drains, surface water, and soil. DBP has a tendency to persist in aquatic environments and disrupts ecosystems.
Cleanup Practices: Absorb with sand or inert material, shovel into approved waste container, clean surface with detergent solution as solvent residues linger
Handling Notes: Wear appropriate PPE, use only with adequate ventilation, avoid skin and eye contact
Storage Requirements: Store in tightly closed containers, keep in cool, ventilated area away from heat sources, segregate from strong oxidizers
Workplace Controls: Local exhaust recommended at points of transfer or mixing
Occupational Limits: ACGIH and OSHA assign exposure limits, generally time-weighted averages for workplace air
Engineering Controls: Use fume hoods, splash guards, and well-sealed pumps for moving liquid DBP
Personal Protective Equipment: Nitrile or butyl gloves, chemical splash goggles, impervious aprons, and sensible footwear. Respiratory protection makes sense if vapors accumulate or during spill cleanup.
Physical State: Oily liquid
Boiling Point: Roughly 340°C
Melting Point: About -35°C
Density: Close to 1.05 g/cm³ at 20°C
Solubility: Insoluble in water, dissolves in most organic solvents
Vapor Pressure: Low at room temperature, but enough to cause slow evaporation
Odor Threshold: Faint, hard to detect unless heated or spilled
Flash Point: Ranges near 170°C—emphasizing moderate fire risk in bulk storage
Chemical Stability: Remains stable under normal temperatures and pressures
Reactive Hazards: Reacts with strong acids, strong bases, and oxidizers
Decomposition Products: Heating yields choking smoke and acids, which deserve careful respect in confined settings
Acute Effects: Short exposure can trigger eye and skin irritation; large volumes or frequent contact often worsen effects
Chronic Effects: Associated with hormone disruption, developmental risks for unborn children, and potential carcinogenic effects, though debates continue over the magnitude of risk from routine exposure
Routes of Exposure: Inhalation, skin absorption, incidental ingestion on contaminated hands—all add up in jobs that handle DBP day after day
Environmental Fate: DBP resists quick breakdown in soil or water and migrates through groundwater
Aquatic Toxicity: Harmful to fish, inhibits growth and reproduction in aquatic invertebrates
Bioaccumulation: Can build up in sediment and in some aquatic organisms, causing ripple effects through food chains
Disposal Practices: Collect and deliver liquid waste to certified hazardous disposal plant, burning in incinerators with proper gas scrubbing for large quantities
Container Disposal: Triple rinse drums before recycling or landfill; leftover residues warrant strict attention to avoid environmental contamination
Transport Classification: Identified as a regulated substance in bulk, assigned UN codes for bulk liquid transport
Labeling: Marked with hazard warning symbols and proper shipping names during transport
Special Handling: Bulk shipments require compatible containers and pre-notification to handlers because DBP’s spill risk and toxicity profile prompt regulatory enforcement worldwide
Global Regulations: Strict restrictions in the European Union under REACH, banned in many children’s products in the US and Canada
EPA and OSHA: Set exposure limits, list DBP as toxic under SARA Title III
Food Contact: Most food-centric uses now banned or severely limited due to evidence of hormonal effects
