Baby Safety / Compounds / Octinoxate

Is Octinoxate safe for babies and kids?

Elevated risk for kids

Infants are more vulnerable to Octinoxate than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What is octinoxate?

The IUPAC name is 2-ethylhexyl (E)-3-(4-methoxyphenyl)prop-2-enoate.

Also known as: 2-ethylhexyl (E)-3-(4-methoxyphenyl)prop-2-enoate, 2-Ethylhexyl p-methoxycinnamate, Parsol MCX, Parsol MOX.

IUPAC name
2-ethylhexyl (E)-3-(4-methoxyphenyl)prop-2-enoate
CAS number
5466-77-3
Molecular formula
C18H26O3
Molecular weight
290.4 g/mol
SMILES
CCCCC(CC)COC(=O)C=CC1=CC=C(C=C1)OC
PubChem CID
5355130

Risk for babies

Elevated risk

Infants are more vulnerable to Octinoxate than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal 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

High risk

Pregnancy alters the metabolism and distribution of Octinoxate, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

Known reproductive toxicant (GHS H360) or confirmed endocrine disruptor. Placental transfer is presumed. Fetal exposure during critical developmental windows may cause structural malformations, growth restriction, or functional deficits.

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

Regulatory consensus

3 regulatory and scientific bodies have classified Octinoxate. The classifications differ — that's the data.

AgencyYearClassificationNotes
WHO2021no carcinogenicity classification; UV-B sunscreen filter without formal carcinogenicity assessment; FDA Category III (insufficient data for GRASE pending additional safety studies); banned in Hawaii and several other jurisdictions for coral reef toxicity
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 2 negative reports)
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 2 negative reports)

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 octinoxate

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles
  • Personal Care — sunscreen, moisturizer with SPF, foundation, lip balm

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Octinoxate:

  • Fragrance-free formulations
    Trade-offs: Consumer preference for scented products
    Relative cost: 1.2-2×
  • Essential oil-based fragrances (with disclosure)
    Trade-offs: Natural does not mean safe — many essential oils are skin sensitizers
    Relative cost: 2-5×

Frequently asked questions

Is octinoxate safe for kids?

Infants are more vulnerable to Octinoxate than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What products contain octinoxate?

Octinoxate appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments); sunscreen (Personal care).

What should I do if my child is exposed to octinoxate?

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 octinoxate?

Octinoxate has been classified by 3 agencies including WHO, EPA CTX / Genetox, EPA CTX / Genetox, 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 Octinoxate in the baby app

Look up products containing octinoxate, compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. FDA 2019 OTC Sunscreen Proposed Rule: Octinoxate Category III Insufficient GRASE Data; Blood Concentration 258 ng/mL Maximal Use Pharmacokinetics; ERα Estrogenic Activity; Uterotrophic Effect Rat; Additional Safety Data Required (2019) — regulatory
  2. Hawaii Act 104 Reef Safe Sunscreen 2021: Octinoxate Oxybenzone Banned Sale January 1 2021; Coral Bleaching Zooxanthellae Viral Activation 10–100 ppb; Palau Bonaire Maldives Reef Bans; Beach Monitoring UV Filter Contamination (2021) — 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 →