Other Names:
DOP, DEHP, Bis(2-ethylhexyl) phthalate, Di-2-ethylhexyl phthalate, 1,2-Benzenedicarboxylic acid
Specification Summary
- Purity: ≥99% (industrial grade)
- Form: Clear, colorless liquid
- CAS No.: 117-81-7
- Molecular Formula: C₂₄H₃₈O₄
- Molecular Weight: 390.56 g/mol
Product Description
Dioctyl Phthalate (DOP) is a non-corrosive, neutral (pH ~7), low-volatility liquid with a slight characteristic odor. It is insoluble in water but soluble in most organic solvents, including oils and chlorinated hydrocarbons. DOP exhibits excellent thermal stability, UV resistance, and hydrolysis resistance, making it suitable for high-temperature applications. Its low freezing point (-46°C) and high boiling point (~230°C) ensure performance across extreme conditions.
Plasticizers Specification Table
| Property | Value/Range | Test Method/Notes |
| Appearance | Clear, colorless liquid | Visual |
| Density (20°C) | 0.981–0.989 g/cm³ | ASTM D4052 |
| Acid Value | ≤0.1 mg KOH/g | ASTM D974 |
| Molecular Weight | 390.56 g/mol | |
| Boiling Point | ~230°C | At 760 mmHg |
| Flash Point | >200°C | Open vessel method |
| Viscosity (20°C) | 75–85 mPa·s | ASTM D445 |
| Solubility in Water | 0.1 g/L (20°C) | |
| Refractive Index (20°C) | 1.484 ± 0.003 | ASTM D1218 |
| Freezing Point | -46°C | |
| Volatility | Low | Stable at ≤180°C |
Downloadable TDS:
A comprehensive Technical Data Sheet (TDS) is available for download, providing detailed mechanical, thermal, and electrical properties, as well as processing guidelines for polystyrene
Application Sectors and Industries of Plasticizers
PVC Manufacturing
DOP is a primary plasticizer for flexible PVC, enhancing flexibility and durability in products like synthetic leather, films, and sheets. It reduces production costs while maintaining compatibility with resins.
Cables and Wires
Used in insulation and sheathing materials, DOP improves electrical properties and flame retardancy in power and communication cables.
Automotive Parts
Plasticizes dashboards, door panels, and seals, offering resistance to temperature fluctuations and mechanical stress.
Construction Materials
Key in PVC pipes, roofing membranes, and flooring for water resistance and longevity. Enhances flexibility in weatherproofing applications.
Consumer Goods
Imparts softness to toys, shoe soles, and disposable gloves. Complies with safety standards for non-toxic end uses.
Medical Devices
Used in blood bags and tubing for its biocompatibility and stability during sterilization processes.
Textiles and Upholstery
Softens synthetic fabrics and vinyl coatings for furniture, improving wear resistance and comfort.
Packaging
Adds flexibility to blister packs and food-grade films while ensuring chemical inertness.
Adhesives and Sealants
Enhances adhesion and elasticity in construction sealants and industrial adhesives.
Paints and Coatings
Improves pigment dispersion and durability in water-resistant coatings for marine and architectural use.
Packaging Types
- 55-Gallon Drums: Sealed steel or HDPE drums for secure liquid storage and transport.
- IBC Totes (1,000 liters): Intermediate bulk containers for high-volume industrial users.
- Bulk Tankers: Insulated stainless-steel tankers for large-scale deliveries.
- Custom Quantities: Available in 25 kg cans or flexitanks for specialized requirements.
Dioctyl Phthalate (DOP) remains a cost-effective, high-performance plasticizer critical for flexible PVC and polymer applications. Its balance of thermal stability, compatibility, and safety ensures widespread use across industries. For detailed processing guidelines and regulatory compliance, request the downloadable TDS.
