What concentration of Salicylic Acid is effective?

Typical effective concentrations of Salicylic Acid are 0.5–2% in OTC leave-on products (EU max 2%), 20–30% in professional chemical peels, up to 3% in rinse-off products.

What skin types is Salicylic Acid suitable for?

Salicylic Acid is suitable for oily, acne-prone, congested pores, blackheads, whiteheads, large pores.

The Skin Formulary

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Researched by Helena DeMaria-Williams

Active IngredientBeta Hydroxy Acid

Salicylic Acid

Q: Can Salicylic Acid cause skin irritation?

Salicylic Acid has a medium irritation risk. Can cause dryness, peeling, and irritation, particularly at concentrations above 2%. Sensitive skin types should patch test. EU Annex III restricts to 2% in leave-on products and 3% in rinse-off products. Not recommended for people with aspirin sensitivity.

Q: Is Salicylic Acid safe to use during pregnancy?

Salicylic Acid is rated "caution" for pregnancy use. Low-concentration OTC leave-on products (up to 2%) are generally considered low risk for topical use. High-concentration professional peels and oral salicylates should be avoided during pregnancy. Consult a healthcare provider before use.

Q: Does Salicylic Acid increase sun sensitivity?

Salicylic Acid has a no sun sensitivity risk. Unlike AHAs, salicylic acid does not increase photosensitivity at standard OTC concentrations (0.5–2%). Some research suggests it may have mild photoprotective properties. However, using SPF daily is still recommended as a general skincare best practice.

Q: What are the benefits of Salicylic Acid for skin?

exfoliation, pore-clearing, anti-acne, blackhead removal, anti-inflammatory, smoothing texture, reducing sebum

INCI: Salicylic Acid

Salicylic acid is a beta hydroxy acid (BHA) derived from willow bark, with a chemical structure related to aspirin. Unlike water-soluble AHAs, it is lipid-soluble, allowing it to penetrate into pores and dissolve the oil and debris that cause blackheads and breakouts. It also has anti-inflammatory properties that help calm redness associated with acne.

Typical Concentration

0.5–2%in OTC leave-on products (EU max 2%)

20–30%in professional chemical peels

up to 3%in rinse-off products

Best For Skin Types

oilyacne-pronecongested poresblackheadswhiteheadslarge pores

CAS Number

69-72-7

What are the benefits of Salicylic Acid?

✓exfoliation

✓pore-clearing

✓anti-acne

✓blackhead removal

✓anti-inflammatory

✓smoothing texture

✓reducing sebum

Is Salicylic Acid safe? Key considerations

Can Salicylic Acid cause irritation?

Medium Risk

Can cause dryness, peeling, and irritation, particularly at concentrations above 2%. Sensitive skin types should patch test. EU Annex III restricts to 2% in leave-on products and 3% in rinse-off products. Not recommended for people with aspirin sensitivity.

Does Salicylic Acid increase sun sensitivity?

No Risk

Unlike AHAs, salicylic acid does not increase photosensitivity at standard OTC concentrations (0.5–2%). Some research suggests it may have mild photoprotective properties. However, using SPF daily is still recommended as a general skincare best practice.

Is Salicylic Acid safe during pregnancy?

Caution

Low-concentration OTC leave-on products (up to 2%) are generally considered low risk for topical use. High-concentration professional peels and oral salicylates should be avoided during pregnancy. Consult a healthcare provider before use.

How does Salicylic Acid work?

Salicylic Acid is a beta hydroxy acid active used across a range of concentrations depending on the application and product format.

Particularly beneficial for oily and acne-prone and congested pores and blackheads and whiteheads and large pores skin.

Individuals with aspirin sensitivity, sensitive skin, dry skin (use with caution), rosacea (use with caution), open wounds, active irritation should review the considerations above before use.