Dioctyl Phthalate (DOP) is a commonly used plasticizer in flexible PVC and polymer applications. It provides excellent plasticity, thermal stability, and processing performance. DOP is widely used in cables, hoses, flooring, artificial leather, and films.
| Property | Typical Value |
|---|---|
| Chemical Formula | C24H38O4 |
| CAS No. | 117-81-7 |
| Appearance | Clear, oily liquid |
| Purity | ≥ 99.5% |
| Acid Value | ≤ 0.01 mg KOH/g |
| Density (20 °C) | 0.983 g/cm³ |
| Flash Point | > 200 °C |
| Refractive Index (20 °C) | 1.485 ± 0.002 |
| Concern | DOP Advantage |
|---|---|
| Need for flexible, durable plastic | DOP offers high plasticizing efficiency and softness |
| Worried about processing stability | DOP provides good heat resistance and low volatility |
| Cost sensitivity in mass production | DOP is cost-effective for high-volume applications |
| Compatibility with existing PVC systems | Excellent miscibility with most PVC grades |
Q1: Is DOP suitable for food-grade products?
No. DOP is not recommended for food contact materials due to regulatory restrictions in many countries.
Q2: Can DOP be replaced with eco-friendly alternatives?
Yes. Options like DOTP or ESBO are used in green formulations.
Q3: What is the normal dosage in PVC compounds?
Typically 25–50 parts per hundred resin (phr) depending on flexibility requirement.
