Butylene Glycol: effective % & pH 부틸렌글라이콜
⏱ 1 min read
⚡ Quick answer: Butylene Glycol: effective concentration 1–10% in leave-on formulas; higher in watery toners, optimal pH tolerant across roughly 3.0–8.0, evidence Moderate. Seeing it second on the list is normal and not a sign of a cheap formula. It is a solvent first, a humectant second.
How much Butylene Glycol actually works? Here's the dosage, pH and evidence — the formulator-level read behind the % on a Korean label.
| Effective % | 1–10% in leave-on formulas; higher in watery toners |
|---|---|
| Optimal pH | tolerant across roughly 3.0–8.0 |
| Evidence | Moderate |
| Onset | immediate (feel) |
What the % on the label really means
Seeing it second on the list is normal and not a sign of a cheap formula. It is a solvent first, a humectant second.
⚠️ Ceiling: Above roughly 10% it starts to feel slightly astringent and adds nothing useful.
Butylene Glycol guide →How Butylene Glycol works →
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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.