Salicylic Acid
Beta hydroxy acid (BHA) used in acne treatment. Low-concentration topical use (≤2%) is generally considered safe; oral salicylates and high-strength peels are not.
Quick answer
Low-concentration topical salicylic acid (≤2%, in cleansers and toners) is generally considered safe in pregnancy. Avoid high-strength chemical peels, oral salicylates, and full-strength leave-on acne treatments. Azelaic acid is a stronger-evidence pregnancy-safe alternative for acne.
INCI name
Salicylic Acid
CAS number
69-72-7
Also known as
2-Hydroxybenzoic acid, BHA, beta hydroxy acid, ortho-hydroxybenzoic acid
Formula
C7H6O3
What is Salicylic Acid?
What salicylic acid is
Salicylic acid is a beta hydroxy acid (BHA) — the most commonly used over-the-counter acne and exfoliation active. It’s lipid-soluble, allowing it to penetrate the oily contents of clogged pores and exfoliate from inside the follicle1. It’s also related to aspirin (acetylsalicylic acid) and shares anti-inflammatory mechanisms.
Common uses include acne cleansers, toners, leave-on treatments, exfoliating peels, and dandruff shampoos.
Why salicylic acid is caution-rated in pregnancy
The caution rating reflects the gap between two different exposure scenarios:
- Low-dose topical (≤2% in cleansers/toners): Generally considered safe. Systemic absorption is low, and even with regular use the systemic salicylate dose is well below the threshold associated with adverse pregnancy outcomes2.
- High-dose oral salicylates (full-strength aspirin): Avoided in pregnancy. Associated with increased bleeding risk for mother and neonate; possibly premature closure of the ductus arteriosus in late pregnancy3.
- High-strength leave-on or peel concentrations: Avoided as a precaution. Greater systemic absorption potential. Concentration matters — a 30% chemical peel is very different from a 0.5% cleanser.
The American Academy of Dermatology considers low-concentration topical salicylic acid acceptable in pregnancy4. ACOG agrees, with the same low-concentration caveat.
Practical guidance
- OK: 0.5–2% salicylic acid cleansers and toners used 1–2x daily on small areas (face, back acne).
- OK in moderation: Spot-treatment products at 2% applied to specific acne lesions.
- Avoid: Chemical peels at salon-grade concentrations (15–30%). At-home leave-on serums above 2%. Oral salicylates including high-dose aspirin (low-dose 81 mg aspirin for preeclampsia prophylaxis is a separate clinical scenario directed by your OB).
If you want an even safer alternative
Azelaic acid is FDA Pregnancy Category B with the strongest pregnancy evidence among acne actives. Effective for both inflammatory acne and the post-inflammatory hyperpigmentation that often follows. Glycolic acid at low concentrations is another option, and benzoyl peroxide at ≤5% has minimal systemic absorption.
When to talk to your OB
If you used a product containing Salicylic Acid before learning you were pregnant, mention it at your next prenatal visit — but most topical cosmetic exposures are not a cause for panic. For prescription exposures or specific concerns, contact your OB or midwife directly.
Sources
- U.S. National Library of Medicine. Salicylic acid. PubChem. View source →
- Bozzo P, Chua-Gocheco A, Einarson A. (2011). Safety of skin care products during pregnancy. Canadian Family Physician. View source →
- Bloor M, Paech M. (2013). Nonsteroidal anti-inflammatory drugs during pregnancy and the initiation of lactation. Anesthesia & Analgesia. View source →
- American Academy of Dermatology. Acne in pregnancy. AAD. View source →