COSRXtonerpH 4.0 – 4.5 • $24.00 (100ml)

COSRX BHA Blackhead Power Liquid

Mild Korean BHA alternative utilizing betaine salicylate derived from sugar beets to decongest sebaceous filaments with significantly less stinging than free salicylic acid.

Obstetric SafetyConcentration Dependent

Contains concentration-dependent ingredients (Salicylic Acid (BHA) (WATCH)). Rinse-off formulations are often cleared by OB-GYNs, while leave-ons should be verified.

Always confirm with your OB-GYN.
Malassezia (Fungal Acne)✓ Fungal Acne Safe

Contains zero lipid esters or fatty acid chains that feed Malassezia yeast.

Safe for pityrosporum folliculitis? Yes
Viscosity Application OrderStep 2 of 7 • PM

Texture: Gentle Slippery Exfoliating Liquid. Apply strictly in order of thinnest water to thickest cream.

pH: 4.0 – 4.5
Formulation BalancePotent / Active-Heavy

4 Actives • 7 Functional • 0 Watchlist

11 Total Ingredients

Layering Protocol: What NOT to Mix With This Bottle

Avoid Concurrent Application With:
  • ✕High-strength Retinoids on the same evening
Recommended Synergistic Pairings:
  • ✓Snail Mucin Essence
  • ✓Ceramide Cream
Want to test this bottle with another specific product on your shelf?Open Active Conflict Matrix→

Full INCI Ingredient Declaration

Decoded using Miko's pharmacological database (11 ingredients detected).

Zero Chemophobia • Evidence-Based
Purified Water (Aqua)(Salix Alba (Willow) Bark Water)Base & Solvent

Deionized, ultra-purified solvent that serves as the delivery vehicle for hydrophilic actives and humectants.

neutralPore: 0/5
Glycol / Propanediol Solvent(Butylene Glycol)Base & Solvent

Multifunctional diol that dissolves active ingredients, improves spreadability, and acts as a lightweight humectant.

neutralPore: 0/5
Salicylic Acid (BHA)(Betaine Salicylate)Exfoliant

Oil-soluble beta hydroxy acid that selectively dissolves intracellular lipid bonds inside sebaceous ducts to clear microcomedones.

goodPore: 0/5
Niacinamide (Vitamin B3)(Niacinamide)Active

Essential precursor to NAD+/NADP+ energy cofactors. Enhances skin lipid synthesis, decreases sebum excretion rate, and inhibits pigment transfer.

goodPore: 0/5
2-HexanediolBase & Solvent

Formulation ingredient (emollient, binder, or botanical solvent) standard in cosmetic formulations.

neutralPore: 0/5
ArginineBase & Solvent

Formulation ingredient (emollient, binder, or botanical solvent) standard in cosmetic formulations.

neutralPore: 0/5
Panthenol (Provitamin B5)(Panthenol)Soothing

Enzymatically converts to coenzyme A in the skin, driving lipid biosynthesis, relieving pruritus (itching), and accelerating barrier repair.

goodPore: 0/5
Hyaluronic Acid / Sodium Hyaluronate(Sodium Hyaluronate)Humectant

Endogenous glycosaminoglycan that captures water molecules and plumps fine surface dehydration lines in the stratum corneum.

goodPore: 0/5
Silicone (Dimethicone / Cyclopentasiloxane)(Dimethicone)Emulsifier & Texture

Large-chain polymer that forms a breathable, non-comedogenic mesh over the epidermis to prevent moisture evaporation without clogging pores.

neutralPore: 1/5
Ethyl HexanediolBase & Solvent

Formulation ingredient (emollient, binder, or botanical solvent) standard in cosmetic formulations.

neutralPore: 0/5
Rheology Modifier / Gelling Agent(Xanthan Gum)Emulsifier & Texture

Synthetic or fermentation-derived thickener that gives serums and gels their characteristic slip and prevents formula separation.

neutralPore: 0/5
iPhone App • No Account Required

Have BHA Blackhead Power Liquid on Your Bathroom Shelf?

Point your iPhone camera at this bottle and the rest of your cabinet. Miko reads physical packaging via on-device OCR, alerts you to active clashes, and sequences your weekly 7-day routine from what you already own.

Download on theApp Store
$9.99/mo or $49.99/yr • 7-day free trial included