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Skincare · 6 min read

Face wash ingredients explained: cleansers, humectants and fragrance

To read a face wash label, identify the cleansing surfactants first, then the ingredients that adjust the texture, condition the skin, preserve the formula or add scent. Sodium Laureth Sulfate, Cocamidopropyl Betaine and Decyl Glucoside are different surfactants; Glycerin has a different function. The list does not state exact amounts, final pH or whether the finished cleanser will suit your skin.

Checked against 5 sources on 11 October 2026. How guides are written

Which ingredients actually clean?

Start with the first several names in the list and locate the surfactants. In cosmetic labeling, names are generally listed in descending order by weight, with exceptions for ingredients at or below 1%. The list is not a complete formula.12

  • Sodium Laureth Sulfate: a widely used cleansing surfactant; the name alone cannot measure a formula's mildness.
  • Cocamidopropyl Betaine: a surfactant often combined with other cleansers.
  • Decyl Glucoside: a cleansing surfactant with a different chemical family; read its function, not a simplistic safety ranking.5

Compare the surfactant system rather than declaring one cleanser good and another bad on the strength of a single ingredient. The SLS versus SLES guide provides vocabulary for comparing surfactants.

Humectants, thickeners and the final feel

Glycerin has humectant functions, unlike the cleansing agents above.4 Citric Acid can be used in acidity adjustment, and other ingredients may change thickness and stability. The ingredient list does not reveal the finished product's pH or the percentage of each component.

The European Commission's CosIng database records names and functions. It is an informational resource, not a certificate approving an ingredient or judging a finished cleanser.3

Fragrance and preservatives on the label

Look for Parfum, Aroma or separately listed scent substances such as Linalool. Some EU fragrance constituents require separate declaration under applicable rules.1 See fragrance-free versus unscented when a brand uses either claim.

A water-based formula also needs preservation. Names such as Phenoxyethanol or Sodium Benzoate deserve explanation, not automatic alarm. The preservative guide covers their roles.

Compare two face washes without guessing

  • Find and compare the actual cleansing ingredients.
  • Check humectants and texture-modifying ingredients separately from surfactants.
  • Check the complete label for scent ingredients that matter to your preferences.
  • Do not guess ingredient concentrations or final pH from order alone.
  • Keep unrecognized names visible instead of silently treating them as harmless.

Paste your list into the free face wash ingredient checker, or compare two ingredient lists. For a broader explanation of what labels omit, read ingredient scanner limitations.

Sources

  1. Regulation (EC) No 1223/2009 of the European Parliament and of the Council on cosmetic products, consolidated text of 1 May 2025, Articles 14, 19 and 33. Official Journal of the European Union. eur-lex.europa.eu Checked 10 October 2026.
  2. US Food and Drug Administration. Cosmetics Labeling Guide (content current as of 25 February 2022). fda.gov Checked 10 October 2026.
  3. European Commission. CosIng, the cosmetic ingredient database: what it is and the limits of its information. single-market-economy.ec.europa.eu Checked 10 October 2026.
  4. European Commission. CosIng entry GLYCERIN: INCI name and functions, as exported on 9 October 2026. ec.europa.eu Checked 10 October 2026.
  5. European Commission. CosIng entry DECYL GLUCOSIDE: INCI name, chemical description and functions. ec.europa.eu Checked 11 October 2026.

Written for this site from the sources above and checked against them on 11 October 2026. Not reviewed by a dermatologist or toxicologist, and not medical advice. Spotted something wrong? Tell us.

Face Wash Ingredients Explained: Read a Cleanser Label | Ingredient Scanner