Vitamin C Sodium Ascorbyl Phosphate

Sodium ascorbyl phosphate (CAS 66170-10-3), abbreviated SAP, is a stable, phosphorylated form of vitamin C used as an antioxidant and active ingredient in cosmetic and pharmaceutical applications.

Where is Vitamin C Sodium Ascorbyl Phosphate used?

• Topical skincare: antioxidant protection and skin brightening in serums, moisturizers and sunscreens
• Acne treatment: inhibits sebum oxidation
• Cleansers and toners for uneven skin tone
• Cosmetic emulsions: antioxidant stabilizer protecting oxidation-sensitive actives
• Pharmaceutical manufacturers use it as a stabilized vitamin C source in oral and topical drug products.

Good to know: Unlike ascorbic acid, SAP resists oxidative degradation in aqueous formulations.

Commercial specifications

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