One Step Original Clear Pad
Serum
Updated 10 Dec 2025

One Step Original Clear Pad

COSRX
14Ingredients
0EU Banned
2Caution
0.1/5Comedogenic
Pregnancy SafeNo flagged ingredients
0.1/5Comedogenic
Pregnancy SafeNo flagged ingredients
Low Allergens2 fragrance allergens
71% Natural21% synthetic

Contains Regulated Ingredients

EU Restricted Ingredients

These ingredients are permitted in the EU but subject to concentration limits, usage conditions, or mandatory labelling requirements under Annex III of the EU Cosmetics Regulation.

Citrus Aurantium Dulcis (Orange) Peel Oil
Restricted — see EU CosIng Annex III
Sodium Hydroxide
Restricted — see EU CosIng Annex III
What does "EU Restricted" mean?

Restricted ingredients are not banned — they are allowed in cosmetic products as long as specific conditions are met:

  • Concentration limits — maximum allowed percentage in the final product
  • Product type restrictions — some ingredients are only allowed in rinse-off or leave-on products
  • pH restrictions — the finished product must stay within a specific pH range
  • Mandatory labelling — certain allergens must be listed on the packaging
  • Usage conditions — must not be combined with certain other ingredients

These limits are based on the EU CosIng database (Annex III) and are updated regularly. Products sold in the EU must comply with all applicable restrictions.

Ingredient Chemistry

pH

pH Efficacy

pH Efficacy

pH 5.9 — Ineffective
5.9
0Neutral 714
pH estimated from category & ingredients: 5.9
Active ingredients: Salicylic Acid
Salicylic Acid at pH 5.9: likely ineffective — above 4.5
Salicylic Acid is at pH 5.9, which is too high for optimal efficacy (3–4).
Detected actives & ideal pH
Salicylic AcidpH 3–4

Microbiome

Composition & Ethics

Product Details

Attributes

Ethics
VeganLikely
No animal-derived ingredients detected
Cruelty-FreeUnknown
No brand statement — contact manufacturer
Safety
Fragrance-FreeLikely
No fragrance ingredients detected
Key Actives
Hyaluronic Acid SerumConfirmed
Confirmed Inferred Unknown Not compliant

Composition

71% natural22% synthetic
10 natural 1 unknown 3 synthetic

Based on 14 ingredients analyzed. 71% natural, 7% unknown and 22% synthetic.

Active ingredients1 active
Fragrance1 essential oil

Functions Overview (13)

type of chemical entity4:Panthenol, Allantoin, Sodium Hydroxide, Sodium Hyaluronate.
skin conditioning2:Salix Alba (Willow) Bark Water, Arginine
humectant2:Butylene Glycol, Glycerin

Texture & Feel

Texture & Feel

Expected texture
Viscous, serum-like — slightly "thick water" feel
SpreadabilityEasy
AbsorptionFast
Tackiness / ResidueLight
Finish:Luminous / radiant — subtle light-reflecting glow

Slight initial tackiness that fades into a hydrated dewy finish.