Lactic Acid

It is an alpha hydroxy acid (AHA) widely used in cosmetics for pH regulation and cosmetically improving the overall appearance of the skin. It is typically a colorless to light yellow liquid, soluble in water, and may be of biotechnology origin.

In cosmetic formulations, lactic acid acts as a key pH regulator and, when used in carefully measured proportions, contributes to improved skin smoothness and a more even complexion. It is relatively gentle compared to some other AHAs and is suitable for water-based and daily skincare products when used at the recommended concentrations.

Benefits

• Regulating and controlling pH values in cosmetic products
• Improving the appearance, smoothness, and texture of the skin (cosmetically).
• It supports a hydrated appearance and skin comfort.
• Suitable for dry and normal skin when formulated correctly.
• Compatible with ingredients such as glycerin, niacinamide (within a suitable pH), and panthenol

How to use

• Manufacturing stage: Aqueous stage or final pH adjustment stage
• Temperature: Thermally stable and can be added to hot or cold foods.
• The recommended pH range for the final formulation: usually between 3.5 and 6 (depending on the product type).
• Stylistic notes:
  • Add gradually while continuously measuring pH
  • It is often used as a diluted solution to facilitate control.
  • Avoid high concentrations in products intended for daily use.

Recommended ratios

• As a pH regulator: 0.05% – 0.5%
• Skin care products (cosmetic): 0.5% – 2%
• Maximum recommended for cosmetic use (EU): Up to 10% in rinse-off products, and ≤5% in leave-in products, subject to compliance with safety requirements and usage labeling.

Melting

• Water: completely soluble
• Glycolates: Soluble
• Oils: Insoluble
• Notes: For use exclusively in the aqueous phase and does not require additional solvents.

Applications

• pH toners and adjustment products
• Skin care creams and lotions
• Dry skin care products
• Face and body washes
• scalp care products

Storage

• Store in a tightly sealed, corrosion-resistant container.
• Store in a cool, dry place away from direct light.
• A stable material under suitable storage conditions
• Avoid contact with unsuitable metals

Organizational notes:

• For cosmetic use only
• Permitted under EU regulations and the Saudi Food and Drug Authority (SFDA) when adhering to the concentration, final product pH, and labeling requirements.
• It is used as a functional component and pH regulator, not as a therapeutic agent.