
Highlights
WHAT IS IT?
Exfoliating liquid toner with BHA and Niacinamide
FEATURES
Gentle exfoliation, oil control
BEST FOR
Oily, acne-prone skin
CHECKS
Free of sulfates, parabens
Who Is It For?
Adults (18+) Both Men And WomenWhat Does It Help With?
Blackheads Clogged Pores Excess OilBudget
Mid-rangeHow To Use
Which routine should it be used in?
Instructions:
Key Information
What COSRX Says
Product Description:
BHA & Niacinamide exfoliating liquid for gentle exfoliation and oil control. Suggested for mid-level acid users.
About the Brand:
Ingredients Overview
Ingredients List
Salix Alba (Willow) Bark Water, Butylene Glycol, Betaine Salicylate, Niacinamide, 1,2-Hexanediol, Arginine, Panthenol, Sodium Hyaluronate, Xanthan Gum, Ethyl Hexanediol
Key Ingredients
Salix Alba (Willow) Bark Water, Betaine Salicylate, Niacinamide
Ingredients Details
12 Hexanediol
Common Name(s): 12 hexanediol
DESCRIPTION
What It Does: Delivers targeted skin-conditioning or bioactive benefits through a specific mechanism of action suited to the formulation's intended purpose.
Why It's Used: Specialty actives address specific skin concerns through targeted molecular mechanisms, providing efficacy beyond what base formulation ingredients alone can achieve.
How It Works: The bioactive compound interacts with specific molecular targets in skin cells or the extracellular matrix โ enzymes, receptors, structural proteins, or signaling molecules โ triggering beneficial biological responses.
Typically Found In: Serums,treatments,moisturizers,specialty products
TECHNICAL DETAILS
Primary Category: Specialty actives
Secondary Functions: Skin-conditioning,anti-aging
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.01โ5%
SOURCING & ETHICS
Vegan Status: Yes
Halal Status: Yes
Source Notes: Specialty active ingredient; check individual sourcing for vegan status.
SKIN COMPATIBILITY
Irritancy Rating: 1899-12-31 00:00:00 -0800
Sensitivity Concerns: Low sensitization potential at recommended use concentrations.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Well-characterized cosmetic ingredient with established safety profile. generally non-irritating at typical use concentrations. suitable for leave-on and rinse-off cosmetics.
Works Well With: Niacinamide,hyaluronic acid,vitamin c,peptides
Avoid Combining With: Incompatible with oxidizing agents; check ph stability
SCIENTIFIC NOTE
Specialty actives typically work through enzyme inhibition (e.g., tyrosinase inhibition for brightening, mmp inhibition for anti-aging), receptor activation (e.g., retinoid receptors, ppar-ฮณ for barrier genes), or transcription factor modulation (e.g., nrf2 for antioxidant gene upregulation). structure-activity relationships determine potency and selectivity.
Last Verified: Cosing eu database; pcpc cosmetic ingredient safety reviews; ingredient-specific safety and efficacy literature
Primary Sources: 2025-01-15
Arginine
Common Name(s): L-arginine,2-amino-5-guanidinopentanoic acid
CAS Number: 74-79-3
DESCRIPTION
What It Does: Conditions skin, attracts moisture, supports wound healing, and improves microcirculation via no synthesis.
Why It's Used: Multi-functional amino acid for skin hydration, conditioning, and wound healing in peptide and nmf formulations.
How It Works: Guanidinium group binds water (humectant). substrate for nitric oxide synthase (enos) producing nitric oxide that vasodilates capillaries improving skin nutrition. stimulates fibroblast proliferation for wound healing.
Typically Found In: Anti-aging serums,wound healing products,nmf moisturizers,scalp treatments
TECHNICAL DETAILS
Primary Category: Active ingredient โ amino acid
Secondary Functions: Wound healing,microcirculation,nmf component
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%โ5%
SOURCING & ETHICS
Vegan Status: Yes โ plant-derived or synthetic
Halal Status: Yes
Source Notes: Fermentation-derived or synthetic. natural skin component.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Non-irritating; endogenous skin molecule.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Excellent safety profile. natural skin nmf component. ewg score: 1.
Works Well With: Hyaluronic acid,ceramides,peptides,other amino acids
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
Arginine is a conditionally essential amino acid in wound healing where local demand exceeds synthesis capacity. topical arginine provides the nos substrate locally for no-mediated vasodilation and immune cell function in healing tissue.
Last Verified: Cosing database,cir safety assessment,witte & barbul arginine wound healing review
Primary Sources: 2026-03-12
Betaine Salicylate
Common Name(s): Betaine salicylate,trimethylglycine salicylate
CAS Number: 24077-28-9
DESCRIPTION
What It Does: Provides bha exfoliation and pore clearing with improved gentleness vs free salicylic acid.
Why It's Used: Salicylic acid alternative for sensitive or reactive skin where standard bha causes excessive irritation; popular in korean skincare.
How It Works: Betaine salt form provides buffered release of salicylate ions, moderating the rate of keratolytic activity for gentler exfoliation vs free salicylic acid.
Typically Found In: Sensitive acne treatments,korean bha toners,gentle exfoliants
TECHNICAL DETAILS
Primary Category: Active ingredient โ bha derivative
Secondary Functions: Anti-acne,pore clearing,gentle exfoliation
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%โ4%
SOURCING & ETHICS
Vegan Status: Conditional โ betaine may be plant-derived
Halal Status: Yes
Source Notes: Synthetic via kolbe-schmitt reaction or from willow bark extract.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low; gentler than free salicylic acid
Comedogenicity Rating: 0/5 โ anti-comedogenic
Sensitivity Concerns: Can cause dryness, peeling. follow with moisturizer. not for use in pregnancy.
Safe for Sensitive Skin: Yes โ preferred over salicylic acid for sensitive skin
SAFETY & COMPATIBILITY
Safety Profile: Safe at otc concentrations (0.5โ2%). avoid in pregnancy at high concentrations.
Works Well With: Niacinamide,zinc,hyaluronic acid,ceramides
Avoid Combining With: Multiple exfoliating acids simultaneously; avoid in pregnancy at high concentrations
SCIENTIFIC NOTE
Betaine salt modification provides buffered, slower release of salicylate ions compared to free salicylic acid, reducing peak irritant concentration at the skin surface while maintaining keratolytic and anti-acne efficacy.
Last Verified: Cosing database,cir safety assessment,korean cosmetic research
Primary Sources: 2026-03-12
Butylene Glycol
Common Name(s): 1,3-butanediol,bg,1,3-butylene glycol
CAS Number: 107-88-0
DESCRIPTION
What It Does: Provides humectant hydration and active ingredient solubilization with excellent skin feel.
Why It's Used: Preferred glycol humectant in premium and k-beauty formulations for superior skin feel vs propylene glycol with equivalent functionality.
How It Works: Two hydroxyl groups at 1,3-positions provide water binding and solvent activity. better tolerated than propylene glycol with minimal sensitization risk. 4-carbon backbone provides slightly greater hydrophobic character enabling dissolution of less polar actives vs pg.
Typically Found In: Toners,essences,serums,k-beauty formulas
TECHNICAL DETAILS
Primary Category: Functional ingredient โ glycol humectant
Secondary Functions: Tewl reduction,skin plumping
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 1%โ10%
SOURCING & ETHICS
Vegan Status: Yes โ synthetic
Halal Status: Yes
Source Notes: Synthetic or naturally derived. excellent aqueous solubility.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Non-irritating; suitable for all skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Excellent safety profile. ewg score: 1.
Works Well With: Ceramides,emollients,occlusives,glycerin,hyaluronic acid
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
K-beauty's preference for butylene glycol over propylene glycol is driven by two factors: bg's superior skin feel (less tacky than pg's higher viscosity) and its lower sensitization potential (1,3-bg has better spatial distribution of hydroxyl groups that reduces protein interaction vs pg's 1,2-position oh groups).
Last Verified: Cosing database,cir safety assessment
Primary Sources: 2026-03-12