Baby Safety / Compounds / Sodium laureth sulfate (SLES)

Is Sodium laureth sulfate (SLES) safe for babies and kids?

High risk for kids

Infants are exposed to Sodium laureth sulfate (SLES) through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

What is sodium laureth sulfate (sles)?

Also known as: (C10-C16) alcohol ethoxylate sulfated sodium salt, alcohols, C10-16, ethoxylated, sulfates, sodium salts, sodium pareth sulfate.

CAS number
68585-34-2
Molecular formula
C14H29NaO5S
Molecular weight
332.43 g/mol
SMILES
CCCCCCCCCCCCOCCOS(=O)(=O)[O-].[Na+]
PubChem CID
23665884

Risk for babies

High risk

Infants are exposed to Sodium laureth sulfate (SLES) 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 laureth sulfate (SLES) 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 laureth sulfate (SLES).

AgencyYearClassificationNotes
Unknown——

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 laureth sulfate (sles)

  • Personal Care — shampoo, body wash, hand soap, dish soap, toothpaste
  • Consumer Products — laundry detergent

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Sodium laureth sulfate (SLES):

  • Sodium cocoyl isethionate
    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×
  • Coco glucoside
    Trade-offs: Bio-based (from corn/coconut); mild to skin/eyes; biodegrades rapidly (>99% in 28 days); comparable foaming and cleaning at higher concentration; 15-30% cost premium over SLS; compatible with sensitive-skin formulations.
    Relative cost: 1.2-2×
  • Sodium lauroyl sarcosinate
    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 laureth sulfate (sles) safe for kids?

Infants are exposed to Sodium laureth sulfate (SLES) through residues on laundered clothing, baby wipes, and bathing products. Immature skin barrier increases dermal absorption.

What products contain sodium laureth sulfate (sles)?

Sodium laureth sulfate (SLES) appears in: shampoo (Personal care); body wash (Personal care); laundry detergent (Consumer products).

What should I do if my child is exposed to sodium laureth sulfate (sles)?

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 laureth sulfate (SLES) in the baby app

Look up products containing sodium laureth sulfate (sles), compare to alternatives, and explore the full data record.

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Sources (1)
  1. PubChem Compound Database (2026) — database

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 →