Baby Safety / Compounds / Triphenyl phosphate (TPhP)

Is Triphenyl phosphate (TPhP) safe for babies and kids?

Moderate risk for kids

Infants face disproportionate exposure to Triphenyl phosphate (TPhP) through dust ingestion (hand-to-mouth behavior), breast milk transfer, and dermal contact with treated textiles in cribs and car seats.

What is triphenyl phosphate (tphp)?

The IUPAC name is triphenyl phosphate.

Also known as: triphenyl phosphate, Triphenylphosphate, Phosphoric acid, triphenyl ester, Disflamoll TP.

IUPAC name
triphenyl phosphate
CAS number
115-86-6
Molecular formula
C18H15O4P
Molecular weight
326.3 g/mol
SMILES
C1=CC=C(C=C1)OP(=O)(OC2=CC=CC=C2)OC3=CC=CC=C3
PubChem CID
8289

Risk for babies

Moderate risk

Infants face disproportionate exposure to Triphenyl phosphate (TPhP) through dust ingestion (hand-to-mouth behavior), breast milk transfer, and dermal contact with treated textiles in cribs and car seats.

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

Prenatal exposure to Triphenyl phosphate (TPhP) through dust inhalation and dietary intake can affect fetal thyroid function and neurodevelopment. Flame retardants accumulate in breast milk.

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

10 regulatory and scientific bodies have classified Triphenyl phosphate (TPhP). The classifications differ — that's the data.

AgencyYearClassificationNotes
Multiple—Endocrine disruptor
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 10 negative reports)
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 10 negative reports)
EPA CTX / Skin-Eye—Eye Irritation: Category 2B (score: moderate)
EPA CTX / Skin-Eye—Skin Irritation: Not classified (score: low)
EPA CTX / Skin-Eye—Eye Irritation: Category 6.4A (Category 2A) (score: high)
EPA CTX / Skin-Eye—eye irritation: in vivo: Moderate or Mild Irritation (score: moderate)
EPA CTX / Skin-Eye—skin irritation: in vivo: Studies Indicate No Significant Irritation (score: low)
EPA CTX / Skin-Eye—eye irritation: in vivo: Studies Indicate No Significant Irritation (score: low)
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 triphenyl phosphate (tphp)

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Triphenyl phosphate (TPhP):

  • Inherently flame-resistant materials (wool, modacrylic, Nomex)
    Trade-offs: Higher material cost. Limited color/texture options.
    Relative cost: 1.2-2×
  • Barrier fabric technology
    Trade-offs: Adds manufacturing step and cost
    Relative cost: 1.2-2×

Frequently asked questions

Is triphenyl phosphate (tphp) safe for kids?

Infants face disproportionate exposure to Triphenyl phosphate (TPhP) through dust ingestion (hand-to-mouth behavior), breast milk transfer, and dermal contact with treated textiles in cribs and car seats.

What products contain triphenyl phosphate (tphp)?

Triphenyl phosphate (TPhP) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

What should I do if my child is exposed to triphenyl phosphate (tphp)?

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 triphenyl phosphate (tphp)?

Triphenyl phosphate (TPhP) has been classified by 10 agencies including Multiple, EPA CTX / Genetox, EPA CTX / Genetox, 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 Triphenyl phosphate (TPhP) in the baby app

Look up products containing triphenyl phosphate (tphp), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. US EPA: Triphenyl Phosphate — Emerging Contaminant Summary and Endocrine Disruption Screening Program (EDSP) Review (2019) — regulatory
  2. WHO/UNEP: State of the Science of Endocrine Disrupting Chemicals — Organophosphate Flame Retardants and Regrettable Substitution (2012) — 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 →