DINP-2 (Diisononyl Phthalate)CAS 28553-12-0
The highest-volume 'replacement' phthalate — touted as safer, regulated under EU REACH anyway.
Toxic Chemical Databases
Substance-specific listings — these flags are for DINP-2 alone, not for the broader family.
Chemical Type
Long-Chain Branched C9 Phthalate
Chemical Description
DINP-2 is the dominant high-molecular-weight phthalate plasticizer in flexible PVC. Industry promotes it as the safer alternative to DEHP and demonstrably it has weaker anti-androgen activity in standard repro assays. CPSC permanently restricts it from children's toys and childcare articles based on cumulative phthalate exposure modeling, and EU REACH restricts it in children's products that can be mouthed.
Biological Activity
Severity scores specific to this substance, NOT the parent family average. Differences between siblings are real and meaningful.
Top Health Consequences
- Weaker anti-androgen than DEHP but measurable in repro assays
- Liver enzyme induction with chronic exposure
- Cumulative phthalate burden when combined with other phthalates
Pathways of Exposure
- Ingestion of house dust
- Dermal absorption from vinyl flooring
- Diet — migration from food-contact PVC
Building Materials with DINP-2
Listed alphabetically — product categories where this specific substance appears.
Flexible PVC Tubing
Resilient Vinyl Flooring
Vinyl Wall Covering
Vinyl Wire Jacketing
How We Keep DINP-2 Out of a House
DINP-2 is one of the substances our screening is built to catch. A healthy home is won in the specification and the submittal review, long before anyone opens a bucket on site.
If you want a house specified this way from the start, or an existing house assessed for what is already in it, that is the work we do. Earth Bound Homes builds in Palo Alto, Atherton, Menlo Park and across the San Francisco Bay Area.