Baby Safety / Compounds / PFPeS (Perfluoropentane sulfonic acid)

Is PFPeS (Perfluoropentane sulfonic acid) safe for babies and kids?

High risk for kids

Infants accumulate PFPeS (Perfluoropentane sulfonic acid) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.

What is pfpes (perfluoropentane sulfonic acid)?

The IUPAC name is 1,1,2,2,3,3,4,4,5,5,5-undecafluoropentane-1-sulfonic acid.

Also known as: 2706-91-4, perfluoropentanesulfonic acid, 1-Pentanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,5-undecafluoro-, 1,1,2,2,3,3,4,4,5,5,5-undecafluoropentane-1-sulfonic acid.

IUPAC name
1,1,2,2,3,3,4,4,5,5,5-undecafluoropentane-1-sulfonic acid
CAS number
2706-91-4
Molecular formula
C5HF11O3S
Molecular weight
350.11 g/mol
SMILES
C(C(C(F)(F)F)(F)F)(C(C(F)(F)S(=O)(=O)O)(F)F)(F)F
PubChem CID
75922

Risk for babies

High risk

Infants accumulate PFPeS (Perfluoropentane sulfonic acid) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.

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

PFPeS (Perfluoropentane sulfonic acid) persists in maternal adipose tissue and is mobilized during pregnancy and lactation. Lipophilic pollutants concentrate in breast milk and cross the placenta during critical developmental windows.

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

2 regulatory and scientific bodies have classified PFPeS (Perfluoropentane sulfonic acid). The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA——
ECHA——

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 pfpes (perfluoropentane sulfonic acid)

  • Drinking Water — Municipal water supplies, AFFF-impacted groundwater
    EPA UCMR5 analyte
  • Industrial Discharge — Fluorochemical manufacturing wastewater
    Byproduct of PFAS production

Safer alternatives

Lower-risk approaches that achieve a similar outcome to PFPeS (Perfluoropentane sulfonic acid):

  • Non-fluorinated alternatives
    Trade-offs: Functional performance and cost-effectiveness may vary by application.
    Relative cost: 1.2-2×

Frequently asked questions

Is pfpes (perfluoropentane sulfonic acid) safe for kids?

Infants accumulate PFPeS (Perfluoropentane sulfonic acid) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.

What products contain pfpes (perfluoropentane sulfonic acid)?

PFPeS (Perfluoropentane sulfonic acid) appears in: Municipal water supplies (drinking water); AFFF-impacted groundwater (drinking water); Fluorochemical manufacturing wastewater (industrial discharge).

What should I do if my child is exposed to pfpes (perfluoropentane sulfonic acid)?

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 PFPeS (Perfluoropentane sulfonic acid) in the baby app

Look up products containing pfpes (perfluoropentane sulfonic acid), compare to alternatives, and explore the full data record.

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Sources (1)
  1. — expert_curation

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 →