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ERYTHORBIC ACID.

Valuable CAS 89-65-6 / ANTIOXIDANT

A potent antioxidant and reducing agent, Erythorbic Acid is a stereoisomer of Vitamin C, actively safeguarding skin from oxidative stress and environmental damage. It works by neutralizing reactive oxygen species, contributing to an anti-aging effect, and can assist in evening skin tone while boosting the efficacy of other antioxidants.

Antioxidant Reducing Agent Anti-aging Skin Brightening Stabilizer

Science

As a strong reducing agent and antioxidant, Erythorbic Acid protects the skin by scavenging reactive oxygen species (ROS), thereby mitigating oxidative damage and slowing the aging process. Its action also extends to stabilizing co-formulated antioxidants like Vitamin C, enhancing overall product performance, and may contribute to pigment reduction.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH ≤5.9
0 7 14

Stability

This ingredient exhibits optimal stability at pH values below 6, demonstrating robustness in dry conditions, and under exposure to heat and light. To preserve its integrity during formulation, minimize air incorporation during dissolution and mixing, and store the final product at cool temperatures.

Synergies

  • Vitamin C

Conflicts

  • Chemically active metals (e.g., aluminum, copper, magnesium, zinc)
  • Strong bases
  • Strong oxidizing agents

Safety

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel deemed Erythorbic Acid safe for cosmetic use as of their 1999 review. Furthermore, the FDA recognizes it as Generally Recognized As Safe (GRAS) for its role as a chemical preservative.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Valuable

A stable and safe antioxidant, Erythorbic Acid offers broad skin protection, anti-aging benefits, and supports other active ingredients across all skin types.


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