Baby Safety / Compounds / 6:2 Fluorotelomer sulfonate (6:2 FTS)

Is 6:2 Fluorotelomer sulfonate (6:2 FTS) safe for babies and kids?

Moderate risk for kids

Infants accumulate 6:2 Fluorotelomer sulfonate (6:2 FTS) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.

What is 6:2 fluorotelomer sulfonate (6:2 fts)?

The IUPAC name is 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctane-1-sulfonic acid.

Also known as: 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctane-1-sulfonic acid, 1h,1h,2h,2h-perfluorooctanesulfonic acid, 1-Octanesulfonic acid, 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-, 3,3,4,4,5,5,6,6,7,7,8,8,8-Tridecafluorooctanesulphonic acid.

IUPAC name
3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctane-1-sulfonic acid
CAS number
27619-97-2
Molecular formula
C8H5F13O3S
Molecular weight
428.17 g/mol
SMILES
C(CS(=O)(=O)O)C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F
PubChem CID
119688

Risk for babies

Moderate risk

Infants accumulate 6:2 Fluorotelomer sulfonate (6:2 FTS) 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

6:2 Fluorotelomer sulfonate (6:2 FTS) 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 6:2 Fluorotelomer sulfonate (6:2 FTS). The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC2024IARC — Insufficient data for classification — 6:2 Fluorotelomer sulfonate (6:2 FTS; CAS 27619-97-2; also referred to as 6:2 FTSA — fluorotelomer sulfonic acid) has not been classified by IARC for carcinogenicity; 6:2 FTS is a polyfluoroalkyl substance (PFAS) — not a perfluoroalkyl substance — because it contains two non-fluorinated CH2 groups adjacent to the sulfonate group ('6:2' nomenclature: 6 perfluorinated carbons, 2 non-fluorinated carbons connecting to the sulfonate); it is a dominant component of the AFFF (aqueous film-forming foam) formulations that replaced PFOS-based AFFF products after the PFOS phaseout; 6:2 FTS is itself a polyfluoroalkyl surfactant that provides film-forming properties while being positioned as more biodegradable than PFOS; however, 6:2 FTS undergoes biotransformation in the environment to produce PFAS metabolites including PFHxA (perfluorohexanoic acid), PFPeA (perfluoropentanoic acid), and potentially PFHxS (perfluorohexane sulfonate — which IS subject to EPA MCL and Stockholm Convention Annex A); the biotransformation of 6:2 FTS to regulated PFAS end-products is a key environmental concern; 6:2 FTS is listed in the EU drinking water Directive 2020/2184 sum of 20 PFAS ≤0.1 µg/L; it is measured by EPA Method 533 as part of UCMR5; no standalone MCL has been established for 6:2 FTS itself (its metabolites PFOA, PFOS, PFHxS are regulated)
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 1 positive / 5 negative reports)
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 1 positive / 5 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 6:2 fluorotelomer sulfonate (6:2 fts)

  • 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 6:2 Fluorotelomer sulfonate (6:2 FTS):

  • 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 6:2 fluorotelomer sulfonate (6:2 fts) safe for kids?

Infants accumulate 6:2 Fluorotelomer sulfonate (6:2 FTS) 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 6:2 fluorotelomer sulfonate (6:2 fts)?

6:2 Fluorotelomer sulfonate (6:2 FTS) 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 6:2 fluorotelomer sulfonate (6:2 fts)?

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 6:2 fluorotelomer sulfonate (6:2 fts)?

6:2 Fluorotelomer sulfonate (6:2 FTS) has been classified by 3 agencies including IARC, 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 6:2 Fluorotelomer sulfonate (6:2 FTS) in the baby app

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Sources (1)
  1. 6:2 FTS Fluorotelomer Sulfonate CAS 27619-97-2 C8H4F13O3S Not IARC Classified; 6:2 Nomenclature 6 Perfluorinated 2 Non-Fluorinated CH2CH2 Sulfonate Spacer; Post-PFOS AFFF Reformulation 2010+ Military Airport Fire Training; Biotransformation 6:2 FTSO → 6:2 FTCA → 6:2 FTUCA → PFHxA + PFBS + PFHxS Stockholm Annex A; Aerobic Soil Half-Life 10-60 Days Initial Steps Terminal PFAS Persistent Accumulate; US Military AFFF 700+ Sites 6:2 FTS µg/L-mg/L Groundwater; Australia RAAF Williamtown Tindal Civilian Airports Defence PFAS Management Plan 2017 Hundreds M AUD; EU DWD Sum 20 PFAS 0.1 µg/L; EPA Method 533 UCMR5 Monitored; Hepatotoxicity Thyroid T4 Developmental Immunotoxicity Rodent Subchronic; Cumulative Risk 6:2 FTS + Metabolites Framework; PFOS-Free AFFF Not PFAS-Free Regrettable Substitution Pattern; Polyfluoroalkyl vs Perfluoroalkyl CH2CH2 Biodegradation Site (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 →