DIHP (Diisoheptyl Phthalate)CAS 71888-89-6
Medium-chain phthalate used as a flexible-PVC plasticizer — REACH SVHC for reproductive toxicity.
Other Orthophthalates substances:DEHPDBPBBPDCHPDIDPDi-(C10-rich, branched C9-C11 alkyl) PhthalateDi-(C9-rich branched C8-C10-alkyl) PhthalateDIBPDINP-2DnOPDnPP
DIHP 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 DIHP 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
Branched C7 Phthalate
Chemical Description
DIHP is the branched-chain C7 phthalate, intermediate in chain length between DBP and DEHP. EU REACH added it to the SVHC Candidate List on the basis of reproductive toxicity demonstrated in read-across to BBP and DEHP. Significantly smaller market than the dominant phthalates.
Biological Activity
Severity scores specific to this substance, NOT the parent family average. Differences between siblings are real and meaningful.
Endocrine
8/10
Reproductive
8/10
Developmental
7/10
Liver/Kidney
6/10
Cancer
4/10
Neurological
4/10
Cardiovascular
4/10
Immune
3/10
Respiratory
3/10
Skin
3/10
Top Health Consequences
- Reproductive toxicity by read-across to DEHP/BBP
- REACH SVHC Candidate Listed
- Anti-androgen activity in animal models
Pathways of Exposure
- Ingestion of house dust
- Dermal absorption
Building Materials with DIHP
Listed alphabetically — product categories where this specific substance appears.
Flexible PVC Applications
Specialty Plasticizer Uses
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