Dioctyl Phthalate (DOP)
CAS: 117-84-0
Molecular Formula: C₂₄H₃₈O₄
Molecular Weight: 390.55
DOP is the most widely used main plasticizer in plastic processing, recognized for its excellent comprehensive performance and reliability in industrial applications.
Key Advantages
- High plasticizing efficiency with less dosage required for softening PVC
- Low migration and volatility for stable performance
- Resistance to ultraviolet light and water extraction
- Superior cold resistance, flexibility, and electrical properties
- Excellent compatibility with PVC, cellulose resin and synthetic rubber
- Great low-temperature flexibility, preventing finished products from cracking
- High flash point for stable performance during high-temperature processing
- Colorless transparent oily liquid with no negative impact on product gloss
- Improves tensile strength and elasticity of PVC and rubber goods
- No adverse influence on rubber vulcanization process
- Wide application range for film, cable, leather, gloves and wallpaper
Product Attributes
Appearance: Transparent oily liquid
Primary Use: Industrial Plastic Processing
Application Guide
- Widely used in processing polyvinyl chloride, vinyl chloride copolymers, cellulose resins for manufacturing films, synthetic leather, wire and cable sheets, boards, molded products, and plasticizers
- Can be used as a softener for synthetic rubber such as nitrile rubber, improving product resilience and reducing compression permanent deformation without affecting vulcanization
- 80-90% of DOP is used in the PVC industry, with remaining applications in rubber, recycled plastics, lubricants, adhesives, coatings, polymer additives, printing ink softeners, and capacitor oils
Technical Specifications
| Indicator Name |
Typical Factory Value |
| Appearance |
Transparent oily liquid without visible impurities |
| Chroma (Pt-Co) # |
≤30 |
| Purity (%) |
≥99.5 |
| Acid value (mgKOH/g) |
≤0.01 |
| Moisture (wt)% |
≤0.10 |
| Flash point, ℃ |
≥196 |
| Density (20℃), g/mL |
0.982-0.988 |
| Volume resistivity x10⁹ Ω M |
≥1 |
Application Examples
Anti-fogging agricultural PVC film, weather-resistant agricultural PVC film, insulation-grade cable compound, transparent flexible hose, general synthetic leather, soft enamel toys, packaging raw materials, PVC protective gloves, decorative wallpaper and more.