Baby Safety / Compounds / Sodium lauroyl isethionate

Is Sodium lauroyl isethionate safe for babies and kids?

Elevated risk for kids

Infants are exposed to Sodium lauroyl isethionate through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

What is sodium lauroyl isethionate?

The IUPAC name is sodium 2-dodecanoyloxy-ethanesulfonate.

Also known as: sodium 2-dodecanoyloxy-ethanesulfonate, SLI, sodium lauryl isethionate, DIETHYL DIMETHYLMALONATE.

IUPAC name
sodium 2-dodecanoyloxy-ethanesulfonate
CAS number
25704-94-3
Molecular formula
C14H27NaO5S
Molecular weight
330.42 g/mol
SMILES
CCCCCCCCCCCC(=O)OCCS(=O)(=O)[O-].[Na+]
PubChem CID
23668826

Risk for babies

Elevated risk

Infants are exposed to Sodium lauroyl isethionate through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

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

Context-dependent

Prenatal exposure to Sodium lauroyl isethionate through consumer products may affect fetal development. Surfactant compounds can enhance dermal absorption of co-occurring chemicals during pregnancy.

No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

1 regulatory bodyhas classified Sodium lauroyl isethionate.

AgencyYearClassificationNotes
EU_CLP—Not classifiedApproved for cosmetics; known for minimal irritation profile

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 sodium lauroyl isethionate

  • soap bars
  • baby shampoo
  • facial cleansers
  • sensitive skin products

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Sodium lauroyl isethionate:

  • Decyl glucoside or other alkyl polyglucosides (APGs) — milder, plant-derived
    Trade-offs: Consumer preference for 'natural' label; many natural fragrance compounds are potent allergens (limonene, linalool, eugenol); 'natural' ≠ 'safe'; often more expensive than synthetic equivalents.
    Relative cost: 2-5× conventional
  • Sodium cocoyl isethionate (SCI) — low irritation potential
    Trade-offs: Alternative surfactant; performance characteristics (foaming, emulsification, wetting) vary; biodegradability and aquatic toxicity should be assessed; formulation adjustment may be needed.
    Relative cost: 1.2-2×
  • Sodium lauroyl glutamate — amino acid-based, very mild
    Trade-offs: Extremely mild (pH 5.5-6.5); biodegradable; derived from amino acids and fatty acids; premium ingredient cost; excellent consumer perception; lower foam volume than sulfate surfactants.
    Relative cost: 1.2-2×
  • Cocamidopropyl betaine (amphoteric) — gentler than anionic surfactants
    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 sodium lauroyl isethionate safe for kids?

Infants are exposed to Sodium lauroyl isethionate through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

What products contain sodium lauroyl isethionate?

Sodium lauroyl isethionate appears in: soap bars; baby shampoo; facial cleansers.

What should I do if my child is exposed to sodium lauroyl isethionate?

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 Sodium lauroyl isethionate in the baby app

Look up products containing sodium lauroyl isethionate, compare to alternatives, and explore the full data record.

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Sources (2)
  1. PubChem Compound CID 15382 — database
  2. ATSDR Toxicological Profile — CAS 25704-94-3 — reference

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 →