DnPP (Di-n-pentyl Phthalate)CAS 131-18-0
Linear C5 phthalate with potent anti-androgen activity in repro assays.
Other Orthophthalates substances:DEHPDBPBBPDCHPDIDPDi-(C10-rich, branched C9-C11 alkyl) PhthalateDIHPDi-(C9-rich branched C8-C10-alkyl) PhthalateDIBPDINP-2DnOP
DnPP belongs to the Orthophthalates family — products shown above commonly contain one or more substances from this family
Toxic Chemical Databases
Substance-specific listings — these flags are for DnPP alone, not for the broader family.
LBC Red List
Listed
Prop 65
Not Listed
IARC
Not Listed
NTP RoC
Not Listed
GSPI
Listed
REACH SVHC
Listed
TSCA
Not Listed
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.
Endocrine
9/10
Reproductive
10/10
Developmental
9/10
Liver/Kidney
7/10
Cancer
4/10
Neurological
4/10
Cardiovascular
5/10
Immune
4/10
Respiratory
3/10
Skin
3/10
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
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