Baby Safety / Compounds / Di-isononyl phthalate (DINP)

Is Di-isononyl phthalate (DINP) safe for babies and kids?

Elevated risk for kids

Infants are highly exposed to Di-isononyl phthalate (DINP) through mouthing of plastic toys, teethers, bottles, and food packaging leachates. Endocrine disruption risk is amplified during critical windows of reproductive and neurological development.

What is di-isononyl phthalate (dinp)?

The IUPAC name is bis(7-methyloctyl) benzene-1,2-dicarboxylate.

Also known as: bis(7-methyloctyl) benzene-1,2-dicarboxylate, DIISONONYL PHTHALATE, Diisononylphthalate, DINP.

IUPAC name: bis(7-methyloctyl) benzene-1,2-dicarboxylate
CAS number: 28553-12-0
Molecular formula: C26H42O4
Molecular weight: 418.6 g/mol
SMILES: CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C
PubChem CID: 590836

Risk for babies

Elevated risk

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Elevated risk

Prenatal exposure to Di-isononyl phthalate (DINP) is associated with endocrine disruption affecting fetal reproductive development. Phthalates and alternative plasticizers cross the placenta and are detectable in amniotic fluid.

Suspected reproductive toxicant (GHS H361) or suspected endocrine disruptor. Precautionary approach warranted. Animal studies or limited human data suggest developmental toxicity potential.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

6 regulatory and scientific bodies have classified Di-isononyl phthalate (DINP). The classifications differ — that's the data.

Agency	Year	Classification
EPA CTX / Genetox	—	Genotoxicity: negative (Ames: negative, 0 positive / 5 negative reports)
EPA CTX / Genetox	—	Genotoxicity: negative (Ames: negative, 0 positive / 5 negative reports)
EPA CTX / Skin-Eye	—	Eye Irritation: Not classified (score: low)
EPA CTX / Skin-Eye	—	Skin Irritation: Not classified (score: low)
EPA CTX / Skin-Eye	—	skin irritation: in vivo: Moderate or Mild Irritation (score: moderate)
EPA CTX / Skin-Eye	—	skin sensitisation: in vivo (non-LLNA): Not likely to be sensitizing (score: low)

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where kids encounter di-isononyl phthalate (dinp)

Consumer Products — Plastic bottles and containers, Food packaging, Plastic toys and household items
Drinking Water — Leaching from plastic pipes, Migration from bottled water containers
Indoor Environments — Off-gassing from plastic furniture, Degradation of plastic products

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Di-isononyl phthalate (DINP):

Fragrance-free formulations
Trade-offs: Consumer preference for scented products

Relative cost: Lower (ingredient elimination)
Essential oil-based fragrances (with disclosure)
Trade-offs: Natural does not mean safe — many essential oils are skin sensitizers

Relative cost: 2-5× conventional

Frequently asked questions

Is di-isononyl phthalate (dinp) safe for kids?

What products contain di-isononyl phthalate (dinp)?

Di-isononyl phthalate (DINP) appears in: Plastic bottles and containers (Consumer products); Food packaging (Consumer products); Leaching from plastic pipes (Drinking water); Migration from bottled water containers (Drinking water); Off-gassing from plastic furniture (Indoor environments).

What should I do if my child is exposed to di-isononyl phthalate (dinp)?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Why do regulators disagree about di-isononyl phthalate (dinp)?

Di-isononyl phthalate (DINP) has been classified by 6 agencies including EPA CTX / Genetox, EPA CTX / Genetox, EPA CTX / Skin-Eye, EPA CTX / Skin-Eye, EPA CTX / Skin-Eye, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See Di-isononyl phthalate (DINP) in the baby app

Look up products containing di-isononyl phthalate (dinp), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)

EFSA: Cumulative Dietary Risk Assessment — Anti-Androgenic Phthalate Group (DEHP, DBP, BBP, DINP), Group-TDI Derivation, Toddler 99.9th Percentile Exceedance Conclusion, Masculinization Programming Window, and Combined Hazard Index Methodology (2019) (2019) — regulatory
EU Toy Safety Directive (2009/48/EC, amended): DINP Restriction in Mouthed Toys (<0.1% by weight), Cumulative Phthalate Risk Rationale, Childcare Article Coverage, and Precautionary Classification with DEHP/DBP/BBP Despite Lower Individual Potency (2020) (2020) — regulatory

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →