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Diisobutyl phthalate (DIBP) is an organic compound with the chemical formula C₁₆H₂₂O₄. It is an ester of phthalic acid and isobutanol, consisting of a phthalate backbone with two isobutyl groups (-CH₂CH(CH₃)₂) attached. This structure makes it a plasticizer, commonly used to improve the flexibility and durability of plastics.
Diisobutyl phthalate is widely used in the production of polyvinyl chloride (PVC) products, such as cables, flooring, and coatings. It is also employed in the formulation of adhesives, inks, and cosmetics. However, due to environmental and health concerns, its use is increasingly regulated in many regions.
The compound is typically a clear, colorless to pale yellow liquid with a mild odor. It is relatively stable but can cause irritation to the skin, eyes, and respiratory system upon prolonged exposure. Proper handling, including the use of personal protective equipment (PPE), is essential. It should be stored in a cool, dry place, away from heat and incompatible materials.
| Property | Value |
|---|---|
| Molecular Formula | C₁₆H₂₂O₄ |
| Molecular Weight | 278.35 g/mol |
| Boiling Point | 327°C |
| Melting Point | -50°C |
| Solubility in Water | 0.01 g/L (low) |
| Appearance | Clear, oily liquid |
DIBP is widely used in:
Plastics manufacturing (PVC, adhesives, coatings)
Printing inks
Consumer products (flooring, synthetic leather)
| Property | DIBP | DBP | DEHP |
|---|---|---|---|
| Flexibility | High | High | Very High |
| Volatility | Moderate | High | Low |
| Toxicity | Moderate | High | High |
Health Risks: Potential endocrine disruptor, linked to reproductive toxicity.
Regulatory Status: Restricted in toys, childcare products (EU REACH, US EPA).
Environmental Impact: Poor biodegradability, bioaccumulation risk.
| Region | Permissible Limit | Regulated Products |
|---|---|---|
| EU | ≤ 0.1% (weight) | Toys, childcare items |
| USA | Restricted (EPA) | Consumer plastics |
| China | Restricted (GB) | PVC materials |
| Category | Details |
|---|---|
| Chemical Formula | C₁₆H₂₂O₄; phthalic acid ester |
| Key Applications | – Plasticizers: PVC flexibility enhancer – Adhesives: Nitrile-based formulations – Lubricants: Low-temp oil additive – Cosmetics: Nail polish binder |
| Physical Properties | – Boiling Point: 340°C – Flash Point: 182°C (closed cup) – Viscosity: 45cSt @20°C – Solubility: <0.1% in water |
| Safety Concerns | – Toxicity: Reproductive/developmental effects – Regulatory Status: REACH Annex XVII restricted – Exposure Routes: Inhalation, dermal contact – Handling: Avoid heat/sparks |
| Environmental Impact | – Persistence: Low biodegradation potential – Bioaccumulation: Log Kow=4.9 – Aquatic Toxicity: LC50 (Daphnia)=18mg/L – Soil Mobility: Moderate (Koc=320) |
| Alternatives | – Non-phthalate: DINCH, DOTP – Bio-based: Epoxidized soybean oil – Regulatory Compliance: RoHS, CPSIA restrictions |
| Market Dynamics | – Demand Shift: Declining in toys/childcare products – Growth Areas: Automotive underbody coatings – Price Drivers: Phthalic anhydride feedstock costs |
| Sustainability Trends | – Circular Economy: Recycling PVC containing DIBP – Product Stewardship: Extended Producer Responsibility (EPR) programs – Green Chemistry: Enzymatic synthesis research |
Note: Traditional plasticizer facing regulatory pressures. Transitioning to specialty applications with stricter exposure controls.
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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