Verified Beauty Data

Dupe report Nº 018 / Salicylic acid (BHA) leave-on exfoliants

Paula's Choice 2% BHA Liquid dupes, ranked by formula match

It's {vS}% salicylic acid in a clean base. Three cheaper products disclose the exact same number.

Some links earn us a commission. It never changes the verdict — the methodology is public.

02 / The scoreboard

4 formulas, one number that matter

Read the actives column first — it is the apples-to-apples comparison. $ per gram of active is what the working ingredients cost you; the base-formula score is supporting evidence, not the verdict.

Product Actives vs original $ / g of active Price Base formula Verdict
Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Concentration disclosed (2% salicylic acid) $15.47 $36.50 118 mL 100% the reference The original
Exact disclosed active the direct clones — same actives, same percentages
The Ordinary Salicylic Acid 2% Solution Concentration disclosed (2% salicylic acid) $11.17 $6.70 30 mL 85% highest measured The winner Amazon →
PanOxyl Clarifying Exfoliant with 2% Salicylic Acid Concentration disclosed (2% salicylic acid) $5.07 $11.97 118 mL 80% Skip price on Amazon
Stridex Maximum Strength Medicated Pads Concentration disclosed (2% salicylic acid) — not disclosed $4.68 pads 62% Best budget Amazon →

✓ same % as original ≠ different % ? in formula, % undisclosed — not in formula

03 / The original

Why the original is the original

The whole point of Paula's Choice 2% BHA Liquid is restraint: 2% salicylic acid in a deliberately minimal, fragrance-free, leave-on base — water, two glycols, a solubiliser, green tea, and a pH adjuster. Salicylic acid is a beta-hydroxy acid that is oil-soluble, so it gets inside the pore lining to clear congestion and calm inflammation, and it only does that efficiently at a low formula pH.

That low-pH, leave-on, 2% format is what made it a cult product — but none of it is proprietary. Salicylic acid at 2% is the maximum OTC concentration and a commodity active; the formula is eight ingredients. What you are paying $36.50 for is a clean, well-buffered delivery of a number you can read off any competitor's label.

So this page is simple: every candidate below also discloses 2% salicylic acid. The differences are formula gentleness (fragrance, menthol, and alcohol-class surfactants make some of them harsher) and format (liquid vs medicated pad). The active is identical — the honest question is which delivery you want, and how little you can pay for it.

04 / The candidates

Every candidate, examined

01 / The Ordinary

The winner
$11.17 per g of active
$6.70 retail · 30 mL
85% base formula · highest of 6

The Ordinary Salicylic Acid 2% Solution

Shared formula DNA 3 of 8 original ingredients present
Water (Aqua) Methylpropanediol Butylene Glycol Salicylic Acid Polysorbate 20 Camellia Oleifera (Green Tea) Leaf Extract Sodium Hydroxide Tetrasodium EDTA

shared with original not shared rare marker — weighs more in the score

What matches
Discloses the identical 2% salicylic acid in a simple, fragrance-free leave-on solution — the closest match in spirit to the original's minimalism. Shares the original's Polysorbate 20 solubiliser and sodium hydroxide pH adjuster; 3 of 8 ingredients shared. At $6.70 versus $36.50, the most-recommended Paula's Choice BHA dupe.
What differs
Adds saccharide isomerate (a humectant) and a cocamidopropyl surfactant where the original leans on green tea. A smaller 30 mL bottle, so per gram of active it is not the cheapest here — but the sticker price is the lowest of the leave-on liquids.
Who it's for
The winner — the pick if you want the original's gentle, fragrance-free, leave-on 2% experience for about a fifth of the price. $6.70 versus $36.50. New to BHA? This is the standard first bottle.
Ships in
Packaging not verified No brand or retailer statement on the bottle — we won’t guess.
pH
pH not published L-ascorbic acid needs pH below 3.5 to absorb
Data source
Concentration disclosed (2% salicylic acid) 2% salicylic acid disclosed; INCI verified verbatim (INCIDecoder); ASIN B0C3PCJ6SD price PA-API-verified 2026-06-14.

$6.70 for 30 mL → $11.17 per gram of active — 1.4× cheaper per active gram than the original's $15.47.

Buy on Amazon $6.70

02 / PanOxyl

Skip
$5.07 per g of active
$11.97 retail · 118 mL
80% base formula · 2nd of 6

PanOxyl Clarifying Exfoliant with 2% Salicylic Acid

Shared formula DNA 2 of 8 original ingredients present
Water (Aqua) Methylpropanediol Butylene Glycol Salicylic Acid Polysorbate 20 Camellia Oleifera (Green Tea) Leaf Extract Sodium Hydroxide Tetrasodium EDTA

shared with original not shared rare marker — weighs more in the score

What matches
Also a 2% salicylic acid leave-on liquid, with soothing chamomile and glycerin added. Shares the original's butylene glycol; 2 of 8 ingredients shared. A large 118 mL bottle at $11.97 makes it the cheapest per gram of active on this page ($5.07/g).
What differs
A slightly busier formula than the original's eight ingredients (betaine, spirulina extract, extra preservatives), though still fragrance-free. It remains a true 2% leave-on liquid, so the format matches the original.
Who it's for
The value pick — same 2% salicylic, same leave-on liquid format, the most product per dollar. If you go through BHA quickly or treat body areas, the big 118 mL bottle is the economical choice.
Ships in
Packaging not verified No brand or retailer statement on the bottle — we won’t guess.
pH
pH not published L-ascorbic acid needs pH below 3.5 to absorb
Data source
Concentration disclosed (2% salicylic acid) 2% salicylic acid disclosed; INCI verified verbatim (INCIDecoder/DailyMed); ASIN B0C4WGV8WK price PA-API-verified 2026-06-14.

$11.97 for 118 mL → $5.07 per gram of active — 3.0× cheaper per active gram than the original's $15.47.

price on Amazon ($11.97) — not recommended as a dupe

03 / Stridex

Best budget
— per g of active
$4.68 retail · pads
62% base formula · 3rd of 6

Stridex Maximum Strength Medicated Pads

Shared formula DNA 2 of 8 original ingredients present
Water (Aqua) Methylpropanediol Butylene Glycol Salicylic Acid Polysorbate 20 Camellia Oleifera (Green Tea) Leaf Extract Sodium Hydroxide Tetrasodium EDTA

shared with original not shared rare marker — weighs more in the score

What matches
Delivers the same 2% salicylic acid at the lowest sticker price on the page ($4.68), in convenient pre-soaked pads.
What differs
The harshest option and a different format: the pads add alcohol-class surfactants (ammonium lauryl sulfate and xylenesulfonate), menthol, and fragrance — none of which the original's minimal formula contains — making them more drying and more likely to irritate sensitive skin. Because they are pads, there is no per-millilitre cost to compare.
Who it's for
The best-budget pick if you want grab-and-go convenience and tolerate a stronger, more astringent feel — popular for back and body and oilier skin. If your skin is sensitive or dry, the gentler leave-on liquids are the better match for the original.
Ships in
Packaging not verified No brand or retailer statement on the bottle — we won’t guess.
pH
pH not published L-ascorbic acid needs pH below 3.5 to absorb
Data source
Concentration disclosed (2% salicylic acid) 2% salicylic acid disclosed; INCI verified verbatim (INCIDecoder/DailyMed); ASIN B000O1KP1O price PA-API-verified 2026-06-14.

$4.68 (pads) → — not disclosed: the brand doesn't state active percentages, so this number cannot honestly exist.

Buy on Amazon $4.68

05 / Methodology

How we verified this

Verified 2026-06-14

Every formula on this page was tokenized — split into its individual INCI ingredients — and matched against the EU CosIng ingredient database, so "Aqua," "Water," and "Eau" all resolve to the same ingredient.

The base-formula match score works like this: sharing a rare ingredient counts far more than sharing a common one. Almost every serum contains water and glycerin — that proves nothing. Almost nothing contains Ethoxydiglycol or Laureth-23, so when a candidate shares those with the original, it says something real about how the formula was built. (For the statisticians: it is an IDF-weighted Jaccard similarity over the normalized ingredient lists.)

Scores are computed, not opinions. The verdict tags are our editorial read of the actives, the scores, and the prices — and the methodology stays public so you can disagree with us precisely.

Where the ingredient lists come from

  1. Concentration disclosed (2% salicylic acid)

Sources for this report

  • INCIDecoder product pages (live crawl 2026-06)
  • DailyMed / brand drug-facts for OTC salicylic acid actives (PanOxyl, Stridex)
  • Amazon Creators PA-API — ASIN/price verification (2026-06-14)
  • salicylic-acid.json ingredient dossier (verifiedbeautydata internal, 2026-06)

06 / Questions

Frequently asked

What is the best Paula's Choice 2% BHA dupe?
The Ordinary Salicylic Acid 2% Solution ($6.70) is the closest match. It discloses the identical 2% salicylic acid in a simple, fragrance-free leave-on liquid — the same format and the same gentle, minimal spirit as the original — for about a fifth of the $36.50 price. PanOxyl's 2% liquid ($11.97) is the value alternative, and Stridex pads ($4.68) are the cheapest but harsher.
Is The Ordinary Salicylic Acid 2% the same as Paula's Choice 2% BHA?
Functionally very close. Both deliver 2% salicylic acid — the maximum over-the-counter concentration — in a low-pH, fragrance-free, leave-on format, and they share the same Polysorbate 20 solubiliser and sodium hydroxide pH adjuster. The differences are minor: The Ordinary adds a humectant (saccharide isomerate) and a mild surfactant, while Paula's Choice adds green tea. For the active that does the work, they are the same.
Is a cheaper salicylic acid worse than Paula's Choice?
Not for the active. Salicylic acid at 2% is a disclosed, commodity ingredient at its legal OTC ceiling, and all four products on this page hit it. What differs is formula gentleness and format. PanOxyl is actually the cheapest per gram of active ($5.07/g in a 118 mL bottle), and The Ordinary has the lowest sticker price among the gentle leave-on liquids. Cheaper here buys you the same exfoliating acid, not a weaker one.
Are Stridex pads as good as Paula's Choice 2% BHA?
They contain the same 2% salicylic acid, but they are a harsher, different product. Stridex Maximum pads add alcohol-class surfactants, menthol, and fragrance that the original's eight-ingredient formula deliberately avoids, which makes them more drying and more likely to sting sensitive skin. For oily skin, the back and body, or grab-and-go convenience they are a great $4.68 option; for a gentle facial match to Paula's Choice, the leave-on liquids are closer.
Does the salicylic acid percentage matter — is 2% the maximum?
Yes, 2% is the maximum salicylic acid concentration allowed in over-the-counter leave-on exfoliants, and every product here is at that ceiling — so none is "stronger" on the active. Beyond percentage, two things determine how well a BHA works: the formula pH (it needs to sit low, roughly 3–4, for the acid to be active) and overall gentleness. That is why the comparison comes down to formula and format, not concentration.

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