Baby Safety / Compounds / 4-tert-Octylphenol

Is 4-tert-Octylphenol safe for babies and kids?

Context-dependent for kids

Infants are exposed to 4-tert-Octylphenol through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

What is 4-tert-octylphenol?

Also known as: 4-(2,4,4-trimethylpentan-2-yl)phenol, 4-(1,1,3,3-TETRAMETHYLBUTYL)PHENOL, p-tert-Octylphenol, 4-t-Octylphenol.

CAS number
140-66-9
Molecular formula
C14H22O
Molecular weight
206.32 g/mol
SMILES
CC(C)(C)CC(C)(C)C1=CC=C(C=C1)O
PubChem CID
8814

Risk for babies

Context-dependent

Infants are exposed to 4-tert-Octylphenol through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

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

Context-dependent

Regulatory consensus

1 regulatory bodyhas classified 4-tert-Octylphenol.

AgencyYearClassificationNotes
EDC Assessment—Confirmed endocrine disruptor

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 4-tert-octylphenol

  • Consumer Products — personal care, cleaning, industrial

Safer alternatives

Lower-risk approaches that achieve a similar outcome to 4-tert-Octylphenol:

  • Alcohol ethoxylates (non-alkylphenol); Plant-derived surfactants
    Trade-offs: Consumer preference for 'natural' label; many natural fragrance compounds are potent allergens (limonene, linalool, eugenol); 'natural' ≠ 'safe'; often more expensive than synthetic equivalents.
    Relative cost: 2-5× conventional

Frequently asked questions

Is 4-tert-octylphenol safe for kids?

Infants are exposed to 4-tert-Octylphenol through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

What products contain 4-tert-octylphenol?

4-tert-Octylphenol appears in: personal care (Consumer products); cleaning (Consumer products).

What should I do if my child is exposed to 4-tert-octylphenol?

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.

See 4-tert-Octylphenol in the baby app

Look up products containing 4-tert-octylphenol, compare to alternatives, and explore the full data record.

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Sources (1)
  1. PubChem (2026) — database

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 →