Lactic Acid (Cosmetic Grade)
CAS Number: 50-21-5
Lactic acid is an alpha-hydroxy acid (AHA) naturally found in milk, known for its dual action as a chemical exfoliant that loosens desmosomal bonds between corneocytes and as a natural moisturizing factor (NMF) that hydrates the skin by attracting and retaining water. Its larger molecular size compared to glycolic acid makes it gentler and more suitable for regular use on sensitive skin. Used at 2–12% in exfoliating toners, serums, and moisturizers.
Technical Specifications
| appearance | Colorless to slightly yellow clear liquid |
| purity (%) | ≥88 |
| pH (10% aq.) | 1.5–2.5 |
| specific gravity | 1.20–1.21 g/cm³ |
| heavy metals (ppm) | ≤10 |
Applications
- Exfoliating toners and essence products
- Moisturizing serums with exfoliation benefits
- Sensitive skin chemical peels
- Dry skin texture-improving formulations
- Body lotions for keratosis pilaris
Key Features
- Dual exfoliation and moisturization mechanism unique among AHAs
- Gentler exfoliation with NMF building for long-term skin health
- Effective for improving rough texture and keratosis pilaris
- Supports skin microbiome when used at lower pH levels
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CAS Number
50-21-5
Category
Cosmetic Active IngredientsAvailability
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