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Cosmetic ingredient dictionary

Hydrochloric Acid in cosmetics: what it is and what it does

Hydrochloric Acid is a cosmetic ingredient that keeps the product's acidity steady. Open Beauty Facts finds it in 68 products, most often shampoos.

By Bravoora teamUpdated Sources checked 2 sourcesHow we check

What does Hydrochloric Acid do in a product?

In a cosmetic product, Hydrochloric Acid keeps the product's acidity steady. The EU’s CosIng database lists this job for it: buffering.

buffering

What other names and numbers does Hydrochloric Acid have?

CAS number
7647-01-0
EC number
231-595-7
CosIng reference
34321

Which products contain Hydrochloric Acid?

Open Beauty Facts finds Hydrochloric Acid in the ingredient lists of 68 of the 22,021 products it has a list for, most often shampoos, anti-dandruff shampoos and hair care.

  • Shampoos44
  • Anti-dandruff shampoos39
  • Hair care6
  • Hair conditioners5
  • Shampoo and conditioners5
  • 2-in-1 shampoos3

Products with it, by country of sale: France 53 · Germany 3 · Spain 3 · United States 2.

Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Hydrochloric Acid turns up, not how much of the market it is.

Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors

Sources

The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.

  1. European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
  2. Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL

Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check

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