Food & Drink / Compounds / PFPeS (Perfluoropentane sulfonic acid)

PFPeS (Perfluoropentane sulfonic acid) in food: ingestion safety

Moderate risk

(People-specific data is limited; this page draws from human adult context.) Short-chain — shorter biological half-life than C8+ PFAS. Liver effects in animal studies. Limited human epi data. Highly mobile in water.

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 people

Moderate risk

Short-chain — shorter biological half-life than C8+ PFAS. Liver effects in animal studies. Limited human epi data. Highly mobile in water.

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 you 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

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).

See PFPeS (Perfluoropentane sulfonic acid) in the food app

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

Open in food View raw API data

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 →