Plasticizers
DINP (Diisononyl Phthalate)
CAS 28553-12-0 — General-Purpose PVC Plasticizer
DINP is the dominant general-purpose plasticizer for flexible PVC, used in wire and cable, flooring, roofing membranes, and automotive parts. Texas-Chem supplies industrial-grade DINP in bulk drums, totes, and tanker.
CAS Number
28553-12-0
Flash Point
Above 200 °C
Regulatory
REACH Compliant
Pack Sizes
Drums · Totes · Tanker
Structure
C₂₆H₄₂O₄ — Diisononyl Phthalate — CAS 28553-12-0
Safety & Regulatory
- NFPA Health
- 1 — Slight hazard
- NFPA Flammability
- 1 — Slight hazard
- NFPA Reactivity
- 0 — Stable
- Flash Point
- Above 200 °C — Non-flammable
- OSHA PEL
- Not established
- DOT Hazard Class
- Not regulated
Grades & Packaging
Available Grades
Pack Sizes
Also Known As
Physical & Chemical Properties
| CAS Number | 28553-12-0 |
| Molecular Formula | C₂₆H₄₂O₄ |
| Molecular Weight | 418.6 g/mol |
| Appearance | Clear colorless to pale yellow liquid |
| Boiling Point | Above 250 °C |
| Flash Point | Above 200 °C — Non-flammable |
| Density | 0.972 g/cm³ at 20 °C |
| Vapor Pressure | Less than 0.01 mmHg at 20 °C |
| Viscosity | ~80 cP at 20 °C |
| Water Solubility | Practically insoluble |
| Regulatory Status | REACH compliant — not SVHC |
| Compatibility | PVC, PVDC, nitrocellulose |
Industrial Applications
Wire & Cable Insulation
DINP is the preferred plasticizer for PVC wire and cable insulation and jacketing, providing excellent electrical properties, heat stability, and long-term flexibility. It meets UL and CSA requirements for 60 °C and 75 °C rated wire.
Flooring & Resilient Products
Used in luxury vinyl tile (LVT), sheet vinyl flooring, and resilient flooring products where long-term flexibility, UV stability, and low volatility are required.
Roofing Membranes
DINP is used in PVC roofing membranes and waterproofing membranes where long-term flexibility and UV resistance are critical for 20+ year service life.
Automotive Interior
Used in PVC automotive interior parts including dashboards, door panels, and seating where heat resistance and low fogging (DIN 75201) are critical.
Industrial Hose & Tubing
Used in PVC industrial hose and tubing for general-purpose fluid transfer applications.
Consumer Products
Used in PVC consumer products including garden hose, toys (REACH compliant), and household products.
Why Source DINP from Texas-Chem
- Industrial-grade DINP in stock — drums, totes, and tanker
- Consistent quality with CoA on every lot
- Same-week delivery across Texas; nationwide LTL and bulk tanker
- Technical support for PVC compounding and wire/cable applications
- One rep from first call to final delivery
DINP — Frequently Asked Questions
What is the difference between DINP and DOP/DEHP?▾
DINP (diisononyl phthalate) has a higher molecular weight (418 vs 390 g/mol) and lower volatility than DOP/DEHP (di-2-ethylhexyl phthalate). DINP is REACH compliant and not classified as SVHC, while DOP/DEHP is classified as SVHC (Substance of Very High Concern) and restricted in many applications. DINP is the preferred replacement for DOP/DEHP in most flexible PVC applications.
Is DINP approved for food contact applications?▾
DINP has limited food contact approvals. For food contact PVC applications, DOTP (dioctyl terephthalate) or citrate ester plasticizers (TBC, TEC) are preferred. Contact Texas-Chem at 855-TEX-CHEM for guidance on plasticizer selection for food contact applications.
What is the typical loading of DINP in flexible PVC?▾
DINP is typically used at 30–60 phr (parts per hundred resin) in flexible PVC compounds. The loading depends on the target hardness (Shore A) and application requirements. Higher loadings produce softer, more flexible compounds. For wire and cable insulation, 30–45 phr is typical; for flooring, 35–55 phr.
Can DINP be used in children products?▾
DINP is subject to restrictions in toys and childcare articles in the EU (REACH Annex XVII) and the US (CPSC). Contact Texas-Chem for current regulatory status and alternative plasticizers (DOTP, TBC) for children product applications.