To use The Ordinary Salicylic Acid 2% Solution, patch test first, cleanse, then cover the affected area with a thin layer. The brand says to start with one application a day, put it before moisturizer, and wear sunscreen in the daytime. I follow that order. The lab history comes after, because it is a good story.

Bayer's records credit a chemist named Felix Hoffmann with the moment. On 10 August 1897, in Elberfeld, he acetylated salicylic acid and produced the first chemically pure, stable form of acetylsalicylic acid. Bayer registered the name Aspirin two years later. Credit for the work is disputed, since another Bayer chemist later claimed he had directed it, but the flask is not. The same acid that sits in this dropper was, for a moment, the most interesting thing in a German laboratory.

The Ordinary Salicylic Acid 2% Solution is that molecule in a dropper. DECIEM, the company behind it, was founded in 2013 by the late Brandon Truaxe and is based in Toronto, and The Ordinary launched in August 2016 with 27 products. The brand's whole manner was plain: name the ingredient, print the percentage, skip the poetry. Estée Lauder Companies invested in DECIEM in 2017 and completed its purchase in 2024. I think that plainness is the real product, because it lets you compare things on the same terms.

The two bottles at the front of the first grid come first. The Salicylic Acid 2% Solution is the water-based serum, and the brand says it is lipophilic, meaning it can get into pores. Use it once a day, in the evening, on the area you are treating. The Anhydrous Solution is the water-free, squalane-based one, and its directions differ: the brand's page says to apply it in the morning and evening. Check which bottle you own before using these steps. Beside them sit Niacinamide 10% + Zinc 1% for oily skin, the AHA 30% + BHA 2% Peeling Solution for occasional use, the Salicylic Acid 2% Masque, Sulfur 10%, Lactic Acid 10% + HA 2% and the Balancing and Clarifying Serum.

These steps are for the Salicylic Acid 2% Solution only, using The Ordinary's own directions and warnings.

 

1. Patch test. Apply it to a small area once a day for three days. The brand advises a patch test before use and says the exfoliating effects may not suit sensitive skin.

 

2. Cleanse. Clean the skin thoroughly first. The directions start with clean skin. The brand puts cleansing (Prep) before the Treat stage.

 

3. Apply. Cover the affected area with a thin layer. That is the brand's wording for the directions on its US page.

 

4. Pace it. Start with one application a day and build to two or three only if needed. If dryness or peeling gets bothersome, drop back. The brand warns excessive drying may occur and says to cut back at the first sign of it.

 

5. Moisturize. Moisturizer goes on after the solution. The brand places it in the Treat stage, before moisturizers (Seal).

 

6. Sunscreen. Wear sunscreen during the day. The brand says the solution may increase sun sensitivity.

 

7. Keep it solo. No other acids, retinoids or peptides with it. One topical acne medication at a time. The brand says other strong actives may lead to irritation and dryness.

 

8. Mind the eyes. If it gets in your eyes, flush thoroughly with water. That is the brand's eye-contact direction.

When should I use The Ordinary Salicylic Acid 2% Solution? The brand says to use it once daily in the PM, in the Treat stage, after cleansing and before moisturizer. Its directions also allow one to three applications a day, starting with one.

 

Do I need to patch test The Ordinary Salicylic Acid first? The brand advises it. Apply the product to a small area once a day for three days to see if you are sensitive. If you get irritation, hives, swelling of the eyes and mouth, blistering or difficulty breathing, rinse off, stop and see a doctor right away.

 

What should I not use with The Ordinary Salicylic Acid 2% Solution? The brand does not recommend using it with other acids, retinoids or peptides. It also says irritation and dryness are more likely if you use another topical acne medication at the same time. Give other acids their own night, and the same goes for retinoids.

 

How do I apply The Ordinary Salicylic Acid 2% Solution? Clean the skin thoroughly, then cover the affected area with a thin layer. Start with one application a day and only build up if needed.

 

If you want the wider picture, here is what salicylic acid actually does and which products use it well.

Acids behave best one at a time, and only once you have worked out how your skin reacts. If you add a second BHA on top of a first because the first seemed gentle, you have just doubled your dose, and the brand itself says not to combine its solution with other acids. If you want a stronger exfoliant, The Ordinary Peeling Solution is its own routine and not one to stack with this. If this solution is too much, azelaic acid is another option to read about.

Paula's Choice Skin Perfecting 2% BHA Exfoliating Toner is the classic liquid BHA, and Medik8's Press & Clear is a gentle salicylic acid toner if you want something softer to start with. The INKEY List's Beta Hydroxy Acid Blemish and Blackhead Serum is the straightforward serum, ALPYN's Pore Perfecting Liquid pairs 2% BHA with borage, and Dr. Dennis Gross's Alpha Beta 2% BHA Breakout Solution is the clinical-sounding one. Clinique's Acne Solutions Clarifying Lotion is the classic liquid exfoliator with salicylic acid. For people who prefer a pad, celimax's Jiwoogae Cica BHA Blemish Toner Pad and innisfree's Retinol plus Salicylic Soothing Toner Pads take the work out of measuring.

A pairing I like: a BHA toner two or three evenings a week and a bland, unscented moisturizer on every other night. It is the quiet routine that makes a bottle last.

What I would skip: a BHA toner after a long beach day. Skin that has had a lot of sun is not the skin you want to exfoliate.

An acid cleanser gets more time on your skin than a quick splash allows if you wash for a full thirty seconds and leave it on while you brush your teeth. It asks nothing extra of you.

CeraVe's Acne Face Cleanser is the simple, familiar one, and Murad's Clarifying Gel Cleanser with Dual Salicylic Acid for Acne-Prone Skin says right in the name what it is built on. SKIN1004's Madagascar Centella Tea-Trica BHA Foam and innisfree's Volcanic BHA Pore Cleansing Foam are the softer, foam-heavy options. Dr. Dennis Gross's Alpha Beta AHA/BHA Daily Cleansing Gel and Medik8's Surface Radiance Exfoliating AHA/BHA Cleansing Gel combine acids, Tata Harper's Regenerating BHA Exfoliating Cleanser is the skincare-brand pick, and Hanyul's Artemisia Soothing 2-in-1 Mask to Foam Cleanser turns into a foam after a few minutes as a mask.

If you are using a leave-on BHA at night, keep the morning cleanser simple. Acids at both ends of the day is how a good routine turns into a tight, shiny face.

What I would skip: a BHA cleanser and a leave-on BHA in the same evening if your skin is already stinging. Let the cleanser take the night off, and rinse with cool water.

Oily skin can be dehydrated skin too, which is why a light gel cream after an acid does more good than another serum. It gives the barrier what it is missing without adding a film.

The INKEY List's Omega Water Cream and Paula's Choice's CLEAR Oil-Free Moisturizer are simple, light, and easy to find. Evereden's Teen Oil-Free Gel-Cream Moisturizer for Blemish-Prone Skin is aimed at younger skin, and Sofie Pavitt Face's Skin Jelly Oil-Free Gel Moisturizer is the cooling, jelly texture its name promises. Estée Lauder's DayWear Matte Oil-Control Anti-Oxidant Moisturizer Gel Cream is for anyone who wants a matte finish under makeup, and Shani Darden's Weightless Oil-Free Moisturizer and Caudalie's Vinopure Oil-Control Moisturizer for Acne Prone Skin fill the middle of the range, and Dr. Barbara Sturm's Clarifying Face Cream rounds out the group.

Then sunscreen, every morning. The brand says BHA may increase sun sensitivity, and I treat that as non-negotiable.

What I would skip: a thick cream or balm on top of a fresh acid on a humid day. Choose the gel, and let the acid do its job underneath.

I would go small first: one bottle, one evening dot on the trouble area, and a week of watching how your skin responds. Patch test first, and skip acids if your skin is raw, peeling or broken. If you are pregnant or trying, the American Academy of Dermatology says to talk to a dermatologist before treating acne yourself.

Hoffmann got a stable compound out of a single reaction. You get a clearer routine from one change at a time. Be patient with the dropper, and let the little dropper do what it was printed to do.

The routines and formulas I keep coming back to.

Fall Skincare Routine

The Best Skincare Routine Is Shorter Than You Think

Anua PDRN, the Salmon DNA Serum Everyone Asks About

EltaMD Sunscreen

Rituals

The Best Facial Cleansers, From Cold Cream to the Rice Wash

Blue Lizard Sunscreen, the Bottle That Notices the Sun Before You Do

Skincare Brands Built by Doctors, Facialists and Founders With a Story