Piel

Ascorbic Acid

INCI name: Ascorbic Acid

Ascorbic Acid is classed in the EU CosIng database as antioxidant, pH buffering, fragrance and skin conditioning. Piel groups it with L-ascorbic acid and vitamin C.

What it does

How Piel groups it

Piel's knowledge base files Ascorbic Acid under:

Piel's note

Pure vitamin C, and the form most of the research on topical vitamin C used. It is unstable in water and light, which is why products containing it are often packaged opaque and change colour as they age.

Pairs to be careful with

Piel's routine check flags Ascorbic Acid next to:

Found in 2,469 products in Piel's catalogue.

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Identifiers

INCI name
Ascorbic Acid
CAS number
50-81-7 / 62624-30-0
EC number
200-066-2 / 263-644-3
CosIng reference
74328

Data from Piel's records, September 19, 2026