Diisononyl Phthalate(DINP) CAS 68515-48-0 / 28553-12-0 PVC Plasticizer
Diisononyl Phthalate (DINP, CAS No. 28553-12-0 / 68515-48-0) is a premier, high-molecular-weight general-purpose plasticizer engineered for flexible Polyvinyl Chloride (PVC) formulations. Offering an optimal balance of processing efficiency, low volatility, and enhanced thermal stability, DINP serves as the ideal direct substitute for Di(2-ethylhexyl) phthalate (DOP / DEHP).
- Superior Efficiency & Durability: Lower volatility and higher permanent flexibility, extending the lifespan of finished PVC products.
- Cost Optimization: Provides a highly cost-effective plasticizing solution without sacrificing mechanical strength or processability.
- Process Compatibility: Excellent compatibility with PVC resins, delivering smoother extrusion and plastisol viscosity stability.
Di-isononyl Phthalate Description
Name: Diisononyl Phthalate (DINP)
Synonyms: 1,2-Benzenedicarboxylic acid / 1,2-diisononyl ester
Molecular Formula: C26H42O4
Molecular Weight: 418.61
CAS NO.: 68515-48-0 / 28553-12-0
Density: 0.97 – 0.98 g/cm3 @ 20 °C (68 °F)
Boiling point: 252 – 267 °C (486 – 513 °F)
Melting point: N/A
Flash point: 200 °C (392 °F)
Appearance: Colorless transparent liquid.
Water Solubility: Insoluble
Properties: Colorless transparent liquid. Insoluble in water. Compatible with polyvinyl chloride, polystyrene, vinyl chloride-vinyl acetate copolymer. Partially compatible with polyvinyl acetate, cellulose acetate butyrate, cellulose nitrate. Incompatible with cellulose acetate ethyl cellulose, methacrylate resin.
Package: 25L/drum, 200L/drum, 1000L/drum
Storage: Keep container airtight. Store in a cool, dark place.
Safety Protection: It is irritating and should be avoided from contact with skin and eyes. Avoid inhaling the vapor or spray of this substance and use it in a well-ventilated area. During use, please follow the relevant safety operating procedures and wear appropriate personal protective equipment.
Equivalent & Substitute References
If you are currently formulating with or sourcing Jayflex DINP; Palatinol N; VESTINOL 9; Plasthall DINP; SANSOCIZER DINP, our Di-isononyl Phthalate provides an equivalent chemical grade and performance drop-in replacement with full REACH/RoHS compliance.
Di iso nonyl Phthalate Technical
| Parameter | Specification (Industrial Grade) | Test Method |
| CAS No. | 68515-48-0 / 28553-12-0 | — |
| Chemical Formula | C26H42O4 | — |
| Molecular Weight | 418.61 g/mol | — |
| Ester Content | ≥ 99.5% | GC |
| Appearance | Clear, colorless, oily liquid | Visual |
| Density (20°C) | 0.972–0.978 g/cm3 | ASTM D4052 |
| Acid Value | ≤ 0.07 mg KOH/g | ASTM D1045 |
| Water Content | ≤ 0.10% | Karl Fischer |
| Color (Pt-Co) | ≤ 30 | ASTM D1209 |
| Flash Point (Open Cup) | ≥ 200 ℃ | ASTM D92 |
1,2-Benzenedicarboxylic acid Applications
- Wire & Cable Insulation: Widely used in 60℃-75℃ rated PVC power cables, automotive wiring harnesses, and flexible cords due to its low volatility and high electrical resistivity.
- Automotive & Flooring: Preferred for automotive Underbody Coatings (UBC), synthetic leather, vinyl flooring, and wall coverings requiring low-fogging performance.
- Coatings & Sealants: Functions as a primary plasticizer in PVC plastisols, polyurethane sealants, and acrylic coatings to enhance flexibility and moisture resistance.
Frequently Asked Questions (FAQ)
Q: What is DINP?
A: Di isononyl Phthalate (DINP, CAS No. 28553-12-0) is a mass-produced, high-performance general-purpose plasticizer. It is a branched phthalate derived from the esterification of phthalic anhydride and isononyl alcohol. Industrially, it serves as an indispensable flexible agent in PVC formulations for cables, flooring, automotive coatings, and artificial leather, providing excellent heat stability, low volatility, and processability.
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