Specialty Additives Available — Bulk Only

Sodium Ascorbyl Phosphate (SAP)

SAP
CAS 66170-10-3 · Formula C6H6Na3O9P · MW 322.05 g/mol

A phosphate-stabilized vitamin C salt that resists oxidation far better than free ascorbic acid in finished formulas. 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.

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HS Code
2936.27
At a Glance
Material Family
Specialty Additives
Record Type
Pure compound
Primary Role
Preservation · Conditioning
Functional Roles
Preservation Conditioning
INCI Name
SODIUM ASCORBYL PHOSPHATE
CosIng Functions
ANTIOXIDANT
Industries Served
Beauty & Personal Care
Applications & Use Cases
  • ▸ 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.
Safety & Handling
Full SDS available on request

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.

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HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2936 . 27
Chapter 29
Organic chemicals
Heading 29.36
Internationally harmonized (WCO HS)
Subheading 2936.27
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
66170-10-3
Molecular Formula
C6H6Na3O9P
Molecular Weight
322.05 g/mol
IUPAC Name
trisodium;[(2R)-2-[(1S)-1,2-dihydroxyethyl]-3-oxido-5-oxo-2H-furan-4-yl] phosphate
INCI Name
SODIUM ASCORBYL PHOSPHATE
PubChem CID
10990876
InChI Key
YRWWOAFMPXPHEJ-OFBPEYICSA-K
Synonyms & Trade Names
Sodium L-Ascorbyl-2-Phosphate sodium ascorbyl phosphate Sodium ascorbyl monophosphate Trisodium ascorbate-2-phosphate l-Ascorbic acid, 2-monophosphate, trisodium salt L-ascorbic acid, 2-(dihydrogen phosphate), trisodium salt 2-phospho-l-ascorbic acid trisodium salt L-Ascorbic acid 2-phosphate trisodium salt AA2P L-Ascorbic acid 2-phosphate trisodium
Full Description

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.

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.

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.

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