SODIUM ASCORBYL PHOSPHATE- ▸ Cosmetic antioxidant: Stabilized vitamin C antioxidant for skin-care formulations.
- ▸ Skin conditioning: Skin-conditioning active in serums and emulsions.
- ▸ Stable C derivative: Water-soluble alternative to ascorbic acid where stability is required.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Sodium ascorbyl phosphate (CAS 66170-10-3) is a water-soluble, phosphorylated derivative and stabilized salt of ascorbic acid (vitamin C). It is used as an antioxidant and skin-conditioning ingredient in cosmetic and personal-care formulations, where it offers greater oxidative stability than free ascorbic acid.
Regulatory & registration requirements
- TSCA (US): Not found on the public (non-confidential) TSCA Inventory
- REACH (EU):
- EC number: 425-180-1
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Vitamin C Derivative Selection & Stabilization (Beauty & Personal Care)
Frequently Asked Questions
What is sodium ascorbyl phosphate used for?
Sodium ascorbyl phosphate (SAP, CAS 66170-10-3) is a water-soluble, phosphorylated salt of ascorbic acid (vitamin C). It is used as an antioxidant and skin-conditioning ingredient in cosmetic and personal-care formulations such as serums and emulsions, where it offers greater oxidative stability than free ascorbic acid.
What is the difference between sodium ascorbyl phosphate and L-ascorbic acid?
Both are vitamin C derivatives, but sodium ascorbyl phosphate is a stabilized phosphate salt that resists oxidation far better than free L-ascorbic acid in water-based systems. Formulators select SAP when shelf-stability and a less acidic working pH are priorities. Refer to our SDS and CoA for grade-specific specifications.
Is sodium ascorbyl phosphate water soluble?
Yes. SAP is a water-soluble salt, which is the primary reason it is used as a vitamin C source in aqueous serums and emulsions rather than oil-phase systems. Solubility data is provided on the SDS.
What is the CAS and HS code for sodium ascorbyl phosphate?
Sodium ascorbyl phosphate is CAS 66170-10-3, molecular formula C6H6Na3O9P. It classifies under HS 2936.27 (vitamin C and its derivatives). These identifiers appear on every CoA and customs document we issue.
How is sodium ascorbyl phosphate supplied in bulk?
We supply SAP as a powder for industrial and contract-manufacturing use, with CoA and SDS per lot. For container quantities, packaging options, and current availability, request a bulk quote and our team will confirm lead time.
What is the REACH and TSCA regulatory status of Sodium Ascorbyl Phosphate (SAP)?
Sodium Ascorbyl Phosphate (SAP) (CAS 66170-10-3) is recorded as REACH-registered in ECHA's public CHEM database (EC 425-180-1); it was not found on EPA's public (non-confidential) TSCA Inventory file.