Description
Description
DL-Mandelic Acid is the racemic form of mandelic acid, an aromatic alpha-hydroxy acid characterized by a phenyl group adjacent to the hydroxy-acid functionality. Its larger molecular structure and lower diffusion rate relative to glycolic acid make it useful in exfoliating systems where formulators seek controlled surface action and a more gradual sensory profile.
Chemical & Technical Profile
| INCI / Identity | Mandelaic Acid / Mandelic Acid |
|---|---|
| CAS No. | 611-72-3 |
| Molecular Formula | C8H8O3 |
| Molecular Weight | 152.15 g/mol |
| Physical Form | White crystalline powder |
| Solubility | Soluble in water; solubility improves with warm water and suitable solvents |
| Functional Category | Alpha-hydroxy acid (AHA) exfoliant |
Mechanism of Action / Technical Function
Mandelic acid lowers cohesion between corneocytes by altering the ionic environment and calcium-dependent processes associated with stratum-corneum desquamation. As an AHA, its apparent activity depends strongly on the fraction present as free acid, which is governed by both total concentration and final pH. The aromatic ring also influences lipophilicity compared with simpler AHAs, contributing to its distinctive formulation behavior.
Formulation Guidelines
Dissolve in purified water, preferably using a controlled aqueous premix. Adjust pH only after complete dissolution and calculate formulation strength based on both acid concentration and final pH rather than percentage alone. Use corrosion-resistant processing equipment and verify compatibility with pump components, liners, and closures. Avoid uncontrolled neutralization because excessive salt formation can change sensory properties and exfoliation profile. Add soothing humectants and barrier-support ingredients where appropriate without masking the need for a properly designed acid system.
Compatibility & Stability
Monitor pH drift, crystallization, color, odor, viscosity, and package compatibility. Buffer capacity should be controlled because seemingly small formulation changes can materially alter free-acid activity. Low-temperature storage can reveal crystallization not seen in fresh batches.
R&D, Scale-Up & Quality Control
DL-Mandelic Acid Powder should be qualified against identity, pH, active-acid basis, clarity, and crystallization, using a retained reference where visual change is relevant.
Packaging, Shipping & Storage
Supplied in a sealed aluminum pouch. Store tightly closed in a cool, dry place away from direct light and moisture. Protect from humid handling conditions.
Estimated Delivery: 10–15 Business Days
Applications
AHA toners, exfoliating serums, facial gels, rinse-off treatments, texture-refining products, and professional acid-based skin-care systems.
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