Vitamin C (L‑ascorbic acid) is a skincare legend - brightening, antioxidant, collagen‑boosting. But it has a fatal flaw: it's neurotic. It oxidizes if you look at it wrong. It hates light. It hates air. It hates pH above 3.5. It hates metal ions. And it stings like a bee when you put it on sensitive skin.
Magnesium Ascorbyl Phosphate (MAP) is the version that went to therapy and learned to chill.
MAP is a phosphate ester of ascorbic acid. We've attached a phosphate group to the 3‑position hydroxyl, and neutralized the molecule with a magnesium ion. This simple chemical modification turns the diva vitamin C into a stable, non‑irritating, easy‑to‑formulate active that actually survives in a bottle.
The "Phosphate Shield": The phosphate group acts like a suit of armor. It protects the ascorbic acid from oxidizing in the presence of air, light, and metal ions. MAP is stable at neutral pH (6.0–7.0) - right where your skin likes it. No more low‑pH serums that tingle (burn) upon application.
The "Enzymatic Key": MAP itself is not biologically active as vitamin C. It's a prodrug. When applied to skin, the enzyme phosphatase (abundant in the epidermis) clips off the phosphate group, releasing pure ascorbic acid directly where it's needed - slowly, over hours, providing sustained release.
MAP vs. L‑Ascorbic Acid (The Diva)
| Property | L‑Ascorbic Acid | Magnesium Ascorbyl Phosphate |
|---|---|---|
| Stability (solution) | Days to weeks | Months (12–24 months) |
| pH required for stability | <3.5 | 5.0 – 7.0 |
| Skin irritation | High (stinging) | Low (non‑irritating) |
| Formulation difficulty | Nightmare | Easy |
| Cost | Low | Moderate |
Specification: 98.0% – 102.0% (on dried basis)
Sample: Sample Available
Test method: HPLC / Titration / ICP-MS
Synonyms: MAP, Magnesium ascorbyl phosphate, Vitamin C phosphate magnesium salt, Ascorbic acid phosphate magnesium salt
MOQ: 1 KG | Package: 1kg/foil bag (double-sealed, light‑protected), 25kgs/fiber drum
Certificate: HACCP, ISO 22000, HALAL, GMP, Kosher (available upon request)
Molecular Formula: C₆H₇O₉P·Mg | CAS: 114040-31-2
Product Characteristics
Appearance
Purity
Solubility
pH (5% solution)
Particle Size
GMP Manufacturing
COA (Certificate of Analysis)
>
Benefits of Magnesium Ascorbyl Phosphate Powder
01Skin Brightening (Tyrosinase Inhibition)
MAP inhibits tyrosinase, reducing new melanin formation. Lightens dark spots, melasma, and post‑inflammatory hyperpigmentation (PIH). As effective as hydroquinone without the toxicity.
02Collagen Synthesis (Anti‑Aging)
Once dephosphorylated, ascorbic acid is an essential cofactor for collagen‑stabilizing enzymes. Result: firmer skin, reduced fine lines and wrinkles.
03Stable & Non‑Irritating
The phosphate shield protects against oxidation. Stable at neutral pH (6–7), no stinging, no redness. Safe for sensitive skin, rosacea, and post‑procedure skin.
04Sustained Release via Skin Phosphatase
MAP is a prodrug. Skin enzymes slowly cleave the phosphate group, releasing active vitamin C over hours - not a one‑time burst that oxidizes within minutes.
05Magnesium Bonus
The magnesium counterion supports skin barrier repair, reduces inflammation, and regulates sebum production - a teammate, not a spectator.
06Easy to Formulate
Unlike L‑ascorbic acid (pH <3.5, oxidation nightmare), MAP is stable in standard emulsions, serums, and toners. Works at neutral pH, compatible with most ingredients.
Application Fields
Skincare & Cosmetics (Hero Application): Brightening serums (3–10% MAP), anti‑aging creams (5–10% MAP), vitamin C moisturizers (2–5% MAP), eye creams (2–3% MAP), sunscreen boosters (1–2% MAP), scalp serums (2–3% MAP).
Pharmaceutical / Clinical: Post‑procedure healing gels, melasma treatment formulations (often combined with tranexamic acid and niacinamide).
OEM Finished Products: Brightening serum, anti‑aging cream, gentle vitamin C moisturizer, melasma treatment, liposomal serum, powder sticks (mix‑your‑own) - full custom manufacturing available.
Production Process
Product Quality Advantage
≥98% Purity – High-quality stabilized vitamin C.
Low Free Ascorbic Acid – ≤0.3% (indicates high phosphorylation).
Low Free Phosphate – ≤0.1% (formulation stability).
Neutral pH (7.0–7.5) – No low‑pH irritation.
Excellent Solubility – Dissolves instantly in cold water.
cGMP Certified – Full traceability and documentation.
Annual Capacity: 1,500 Tons | 15+ years of cosmetic active ingredient expertise
Professional ODM/OEM Services
We provide full OEM/ODM manufacturing for finished products featuring MAP as the key active ingredient.
① Finished Skincare Products
MAP 5% Brightening Serum: With hyaluronic acid and niacinamide.
MAP 10% Anti‑Aging Cream: With peptides and ceramides.
MAP 3% Gentle Vitamin C Moisturizer: For sensitive skin.
MAP + Tranexamic Acid Melasma Treatment: Power couple for dark spots.
MAP Liposomal Serum: Enhanced penetration.
MAP Vitamin C Powder Sticks: Mix‑your‑own serum - MAP powder is stable and dissolves instantly.
② Formulation Support
pH adjustment (target 6.0–7.0), preservation (MAP is not a preservative), texture optimization, stability testing (real‑time and accelerated, monitor MAP degradation via HPLC).
③ Additional Services
Third‑party certification (Kosher, HALAL), regulatory documentation (EU Cosmetic Regulation, FDA compliance).
Export Certificates
Why choose us
XI'AN LANDNUTRA CO., LTD. – Your Trusted Manufacturer of Antioxidant & Functional Ingredients. Rooted in Quality, Driven by Expertise, Committed to Health and Excellence.
Strong Production Capability: Annual capacity 1,500 tons. 15+ years experience, own facility.
Leading Service: ONE-STOP OEM/ODM from pre-sales to after-sales.
Quality Assurance: CQC-certified enterprise, purity embedded in every process.
Broad Market: Botanical Extracts, Cosmetic Ingredients, Functional Ingredients.
15+ years of cosmetic active ingredient manufacturing. cGMP‑certified facilities. Full in‑house OEM/ODM capabilities for brightening and anti‑aging products. Regulatory documentation for global markets. Batch‑specific COA including assay, free ascorbic acid, free phosphate, magnesium content, and heavy metals. Technical support for formulation (stability, pH adjustment, compatibility).
FAQ
| Test Item | Specification (Cosmetic Grade) | Test Result | Conclusion |
|---|---|---|---|
| Appearance | White to pale yellowish-white powder | Conforms | Pass |
| Assay (HPLC) | 98.0% – 102.0% | 99.6% | Pass |
| Magnesium Content | 7.5% – 9.0% | 8.3% | Pass |
| Free Ascorbic Acid | ≤1.0% | 0.3% | Pass |
| Free Phosphate | ≤0.5% | 0.1% | Pass |
| pH (5% solution) | 6.0 – 8.0 | 7.2 | Pass |
| Lead (Pb) | ≤1.0 ppm | <0.3 ppm | Pass |
| Total Plate Count | ≤1,000 cfu/g | <100 cfu/g | Pass |
| E. Coli / Salmonella | Negative | Negative | Pass |
Hot Tags: magnesium ascorbyl phosphate powder, China magnesium ascorbyl phosphate powder manufacturers, suppliers, AP Ceramide AP Powder, Best Hydrolyzed Fish Collagen Powder, best hydrolyzed marine collagen, Natural Ferulic Acid Powder, Oligopeptide 68 Powder, Plant Based Hydrolyzed Rice Protein Powder