Di-(C9-rich branched C8-C10-alkyl) Phthalate (DINP-1)CAS 68515-48-0
Technical-grade DINP mixture used as a flexible-PVC plasticizer.
Toxic Chemical Databases
Substance-specific listings — these flags are for Di-(C9-rich branched C8-C10-alkyl) Phthalate alone, not for the broader family.
Chemical Type
C8-C10 Branched-Chain Phthalate Mixture
Chemical Description
DINP-1 is one of two CAS numbers associated with diisononyl phthalate — the C9-rich branched mixture. Like DINP-2, it is a 'replacement' phthalate that the industry shifted to as DEHP and shorter-chain phthalates came under restriction. Weaker anti-androgen activity than DEHP, but still flagged under EU REACH for restrictions 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 documented at high doses
- Liver enzyme induction in chronic dietary studies
- EU REACH restriction in children's products that can be mouthed
Pathways of Exposure
- Ingestion of house dust
- Dermal absorption from vinyl products
Building Materials with Di-(C9-rich branched C8-C10-alkyl) Phthalate
Listed alphabetically — product categories where this specific substance appears.
Automotive Interior Plastics
Flexible PVC
Vinyl Flooring
How We Keep Di-(C9-rich branched C8-C10-alkyl) Phthalate Out of a House
We do not knowingly install anything containing Di-(C9-rich branched C8-C10-alkyl) Phthalate. Our specifications name the chemistry we refuse, every submittal is screened against it, and substitutions are rejected — which is how a toxin free home stays that way through construction.
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, Menlo Park, San Mateo County and across the San Francisco Bay Area.