Overview
Dioctyl phthalate (CAS 117-84-0 ), commonly abbreviated as DNOP, is a primary plasticizer used to impart flexibility and durability to PVC and other polymer systems. It functions by reducing the glass transition temperature of the base resin.
This chemical enables processors to achieve targeted softness and elongation in finished materials. DNOP is used in flexible PVC compounding for wire and cable insulation, flooring, and industrial sheeting where low volatility is required.
It is particularly valued for applications needing good electrical properties. In coatings and sealants, it acts as a plasticizing modifier to control film flexibility and adhesion across a range of various industrial substrates.
Personal care formulators have incorporated it as a film-forming plasticizer in nail lacquers, though regulatory pressure has driven reformulation in many markets. It also appears in adhesive formulations for viscosity control.
Controlled softness and processing viscosity are critical to end-product performance in these sectors. DNOP is supplied as a clear, oily liquid in bulk quantities, typically in ISO tank containers, drums, and IBCs.
Technical grade is the standard commercial offering, with purity specifications generally at 99% or above. Buyers should verify current regulatory compliance requirements for their target market before sourcing materials.
Restrictions vary by region and application, making due diligence essential for procurement. This material remains a staple in the polymer industry for its reliable performance and consistent chemical properties.
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Physical Properties
| Melting Point | -25 °C |
| Boiling Point | 220 °C @ Press: 4 Torr |
| Density | 0.978 g/cm³ @ Temp: 20 °C |
| Flash Point | 219 °C |
| Color | Colourless |
| Form | Oily Liquid |
| Water Solubility | Insoluble in water. |
| Vapor Pressure | 5(x 10 -8 mmHg) at 82 °C, 500 at 132 °C (Gross and Colony, 1973) |
| Refractive Index | n 20/D 1.485 |
Safety & Handling
Warning GHS08 GHS07 Hazard Statements H313 May be harmful in contact with skin H317 May cause an allergic skin reaction H320 Causes eye irritation H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled H335 May cause respiratory irritation H361 Suspected of damaging fertility or the unborn child H413 May cause long lasting harmful effects to aquatic life Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P233 Keep container tightly closed. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 In case of inadequate ventilation wear respiratory protection. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P403 Store in a well-ventilated place. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P342+P316 Get emergency medical help immediately. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29173200 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 117-84-0
- EC Number
- 204-214-7
- Mol. Weight
- 390.6
- HS Code
- 29173200
- Category
- UV Absorbers & Stabilizers