Baby Safety / Compounds / PFBS (Perfluorobutane sulfonate)

Is PFBS (Perfluorobutane sulfonate) safe for babies and kids?

Moderate risk for kids

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

What is pfbs (perfluorobutane sulfonate)?

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

Also known as: 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonic acid, perfluorobutanesulfonic acid, Nonafluorobutanesulfonic acid, Nonafluoro-1-butanesulfonic acid.

IUPAC name
1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonic acid
CAS number
375-73-5
Molecular formula
C4HF9O3S
Molecular weight
300.1 g/mol
SMILES
C(C(C(F)(F)S(=O)(=O)O)(F)F)(C(F)(F)F)(F)F
PubChem CID
67815

Risk for babies

Moderate risk

Infants accumulate PFBS (Perfluorobutane sulfonate) 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

PFBS (Perfluorobutane sulfonate) 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

3 regulatory and scientific bodies have classified PFBS (Perfluorobutane sulfonate). The classifications differ — that's the data.

AgencyYearClassificationNotes
UNEP—Persistent Organic Pollutant (POP)
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 pfbs (perfluorobutane sulfonate)

  • 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 PFBS (Perfluorobutane sulfonate):

  • Exposure reduction (environmental contaminant)
    Trade-offs: Removes 95-99% of dissolved contaminants including metals, PFAS, nitrates; wastes 2-4 gallons per gallon produced (improving with newer systems); removes beneficial minerals; $0.05-0.25/gallon; requires pre-treatment for longevity.
    Relative cost: 1.2-2×

Frequently asked questions

Is pfbs (perfluorobutane sulfonate) safe for kids?

Infants accumulate PFBS (Perfluorobutane sulfonate) 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 pfbs (perfluorobutane sulfonate)?

PFBS (Perfluorobutane sulfonate) 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 pfbs (perfluorobutane sulfonate)?

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 pfbs (perfluorobutane sulfonate)?

PFBS (Perfluorobutane sulfonate) has been classified by 3 agencies including UNEP, 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 PFBS (Perfluorobutane sulfonate) in the baby app

Look up products containing pfbs (perfluorobutane sulfonate), compare to alternatives, and explore the full data record.

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Sources (2)
  1. US EPA: Toxicological Review of Perfluorobutane Sulfonate (PFBS) — Thyroid Effects, Reference Dose (0.0003 mg/kg/day), and Hazard Index Grouping with Other Short-Chain PFAS (2021) — regulatory
  2. US EPA: National Primary Drinking Water Regulations for PFAS (April 2024 Final Rule) — PFBS in Hazard Index (HI) Mixture Approach; Cumulative Thyroid/Developmental Hazard Assessment (2024) — 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 →