Vitamin C Magnesium Ascorbyl Phosphate

Magnesium ascorbyl phosphate (CAS 113170-55-1), abbreviated MAP, is a water-soluble, stable derivative of vitamin C for cosmetic formulations. Also marketed as Phospitan C, Ascorbyl PM and ORISTAR MAP.

Where is Vitamin C Magnesium Ascorbyl Phosphate used?

• Skin-brightening serums, creams and emulsions: primary vitamin C source where stability and whitening efficacy are the targets
• Anti-aging moisturizers: supports collagen synthesis
• Skincare: helps reduce the appearance of hyperpigmentation
• Suncare and post-sun: antioxidant booster alongside UV filters against oxidative stress from UV exposure
• Toners and essences in Asia-Pacific cosmetic lines: high-stability vitamin C active
• Unlike pure ascorbic acid, MAP resists oxidative degradation.

Good to know: Unlike pure ascorbic acid, MAP resists oxidative degradation. Cosmetic-grade specification, the standard for personal care, with purity typically stated at 95% or higher.

Commercial specifications

• Purity typically 95% or higher
• Bulk supply in kilogram and metric ton quantities