Acetic Acid

Acetic acid is a colorless organic compound with a distinctive sour taste and pungent smell. In cosmetics, it is primarily used as a pH adjuster to help maintain the desired acidity level of a product. It can also have mild antimicrobial properties.

BenefitNone 0 / 4

RiskModerate 1.5 / 4

Irritation i1.5 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Sensitization i0.5 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Systemic exposure i0.2 / 4

Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

• Can be irritating in high concentrations
• May cause skin dryness

Products with Acetic Acid

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Frequently asked questions

Is acetic acid the same as vinegar?

Vinegar is typically a dilute solution of acetic acid, usually around 5-8%. In cosmetic formulations, acetic acid is used in much lower, controlled concentrations.