Sodium Ascorbyl Phosphate (SAP)

Sodium Ascorbyl Phosphate (SAP)

Stable, Water-Soluble Vitamin C Derivative for Brightening & Clarity

INCI Name: Sodium Ascorbyl Phosphate

Appearance: White to off-white crystalline powder

Solubility: Water-soluble

Recommended Usage: 1% – 5%

Primary Functions: Antioxidant, skin-brightening agent, acne-support active

Sodium Ascorbyl Phosphate (SAP) is a highly stable, water-soluble vitamin C derivative designed for use in aqueous and emulsified cosmetic formulations. It provides antioxidant protection and supports a brighter, more even-looking complexion with excellent skin compatibility.

Performance & Formulation

SAP is widely used in skincare due to its formulation stability and low irritation profile. Unlike L-Ascorbic Acid, it remains stable in water-based systems and delivers gradual vitamin C activity through enzymatic conversion at the skin surface.

Key Benefits

• Provides antioxidant protection against environmental stressors
• Supports brighter, more even-looking skin tone
• Gentle alternative to low-pH vitamin C systems
• Well documented for blemish-prone and post-acne care
• Suitable for long-term daily-use formulations

Formulation Guidance

• Typical use: 2% – 3% for balanced efficacy and stability
• Use phase: Water phase
• Recommended pH: 6.0 – 7.0 (can be extended slightly with chelation)
• Stability support: Use chelating agents such as EDTA
• Compatibility: Works well with niacinamide, zinc PCA, and soothing actives

SAP is commonly selected for acne-focused and sensitive-skin formulations where antioxidant support and tone refinement are desired without the irritation risks of acidic vitamin C systems.

Documents

Certificate of Analysis (COA) – Lot # CF0125RM72

Safety Data Sheet (SDS)

Supplied as a cosmetic raw material for formulation use only.