Diisononyl phthalate

Diisononyl phthalate (CAS 68515-48-0), commonly abbreviated as DINP, is a high-molecular-weight phthalate plasticizer used primarily in PVC compounding. Also marketed as 1,2-benzenedicarboxylic acid, di-C8-10-branched alkyl esters, C9-rich.

Where is Diisononyl phthalate used?

• PVC flooring and roofing membranes: durable flexibility over a broad service temperature range
• Automotive interiors: dashboards and door panels with long-term dimensional stability under heat cycling
• Underbody coatings and vehicle parts: resistance to environmental stress
• Wire and cable insulation: supports processing of high-fill compounds where low volatility is a procurement priority
• Printing inks and coated packaging films maintain film integrity and adhesion during production.

Commercial specifications

• Purity levels of 99%+ are standard across major supply channels for industrial chemical distribution.
• Quality control measures ensure compliance with ISO and ASTM reference standards for phthalate plasticizers.