MAGNESIUM ASCORBYL PHOSPHATE- ▸ Cosmetics: Stable vitamin C antioxidant active in skin care.
- ▸ Formulation stability: More oxidation-resistant than free ascorbic acid.
- ▸ Personal care: Water-soluble vitamin C source for serums and lotions.
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 →Magnesium ascorbyl phosphate (MAP, CAS 113170-55-1) is a water-soluble, oxidation-stable derivative of L-ascorbic acid (vitamin C). It is used as an antioxidant active and stable vitamin C source in cosmetic and personal-care formulations.
Regulatory & registration requirements
- TSCA (US): Not found on the public (non-confidential) TSCA Inventory
- REACH (EU):
- EC number: 423-710-6
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
Is magnesium ascorbyl phosphate the same as vitamin C?
Magnesium ascorbyl phosphate (MAP, CAS 113170-55-1) is a water-soluble, oxidation-stable derivative of L-ascorbic acid (vitamin C), not free vitamin C itself. It is used as a stable vitamin C source in cosmetic and personal-care formulations.
What is another name for magnesium ascorbyl phosphate?
It is commonly abbreviated MAP and listed by the INCI name magnesium ascorbyl phosphate (CAS 113170-55-1, formula C12H12Mg3O18P2).
Is ascorbyl phosphate the same as ascorbic acid?
No. Ascorbyl phosphate derivatives are phosphate esters of ascorbic acid that are more oxidation-resistant and water-soluble than free L-ascorbic acid. MAP is the magnesium salt of such a derivative.
Why is MAP used instead of plain ascorbic acid in formulations?
MAP is more oxidation-resistant and water-soluble than free ascorbic acid, which improves formulation stability in serums and lotions. It is supplied as a stable vitamin C source for personal-care manufacturing.
What is the HS code and how is bulk MAP supplied?
MAP classifies under HS 2936.27 (vitamin C and its derivatives). It is supplied in bulk for cosmetic and personal-care formulation; request a bulk quote with CoA and SDS for your target quantity.
What is the REACH and TSCA regulatory status of Magnesium Ascorbyl Phosphate (MAP)?
Magnesium Ascorbyl Phosphate (MAP) (CAS 113170-55-1) is recorded as REACH-registered in ECHA's public CHEM database (EC 423-710-6); it was not found on EPA's public (non-confidential) TSCA Inventory file.