DnPP (Di-n-pentyl Phthalate)CAS 131-18-0
Linear C5 phthalate with potent anti-androgen activity in repro assays.
Toxic Chemical Databases
Substance-specific listings — these flags are for DnPP alone, not for the broader family.
Chemical Type
Straight-Chain C5 Phthalate
Chemical Description
DnPP shows some of the strongest anti-androgen activity in the phthalate family on a per-dose basis in standard rodent repro screens — comparable to or stronger than DEHP. Small commercial market; mostly listed for read-across and cumulative-risk assessment purposes. EU REACH lists DnPP on the SVHC Candidate List.
Biological Activity
Severity scores specific to this substance, NOT the parent family average. Differences between siblings are real and meaningful.
Top Health Consequences
- Potent anti-androgen activity in repro assays
- REACH SVHC for reproductive toxicity
- Treated as a worst-case phthalate in cumulative-risk modeling
Pathways of Exposure
- Ingestion of contaminated house dust
- Dermal absorption
Building Materials with DnPP
Listed alphabetically — product categories where this specific substance appears.
Research / Analytical Standard Use
Specialty Plasticizer Applications
How We Keep DnPP Out of a House
DnPP 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 Menlo Park, Redwood City, San Mateo County and across the San Francisco Bay Area.