Medium concernPlasticizer
Diisononyl phthalate
PhthalateEndocrine disruptorPossible carcinogen
What it is
A high-molecular-weight branched phthalate adopted as a replacement for DEHP in flexible PVC.
What it does
Flexibilises PVC in wire insulation, flooring, and some children’s products.
Why it’s a concern
EPA's 2025 TSCA evaluation found unreasonable risk for four occupational DINP conditions involving adhesives, sealants, paints, and coatings. The other 43 assessed conditions did not significantly contribute. Food-contact materials, cosmetics, and medical devices were outside the evaluation, so the result cannot be extended to those uses.
Also known as
DINP
CAS numbers
28553-12-068515-48-0
Commonly found in
vinyl flooringgarden hosestoys
Safer alternatives
- DINCH
- citrate plasticizers
- non-PVC materials
Related chemical families
Sources
- California Prop 65
- US CPSC Final Rule 2017