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Magnesium ascorbyl phosphate MAP is used as a major ingredient in feed additives, food fortifiers and whitening in advanced cosmetics, and is a valuable fine chemical.Magnesium ascorbyl phosphate (MAP, formula: C₁₂H₁₈MgO₁₄P₂) is a water-soluble, stable L-ascorbic acid (vitamin C) derivative. It boasts strong resistance to oxidation, heat, and pH changes (stable at pH 3–7), overcoming native vitamin C’s instability. As a pro-vitamin C, it hydrolyzes to release active L-ascorbic acid in skin cells, exerting antioxidant and melanin-inhibiting effects. Widely used in cosmetics (1–10% concentrations) for whitening/anti-aging, it’s low-irritating and compatible with common actives. Industrial-grade MAP (≥98% purity) meets global regulations, with a 24–36-month shelf life under proper storage.
| Items | Specifications | Results |
| Appearance | Free flowing white powder | Conforms |
| Assay | ≥98.5% | 99.05% |
| Loss on drying | ≤20.0% | 14.8% |
| pH value （3% aqueous solution） | 7.0~8.5 | 7.25 |
| Free ascorbic acid | ≤0.5% | 0.2% |
| Free phosphoric acid | ≤1.0% | Conforms |
| Product parameters | |
| Cas number: | 113170-55-1 |
| Appearance: | Free flowing white powder |
| Purity: | 98.5% |
| Package details: | 1kg/foil bag; 25kg/fiber drum |
| Brand: | Fortunachem |
Chemical Profile: A white crystalline powder with the formula C₁₂H₁₈MgO₁₄P₂, highly soluble in water (up to 20% at 25°C) and slightly soluble in ethanol.
Stability Superiority: Exceptionally resistant to oxidation, heat, and pH fluctuations (stable at pH 3–7), avoiding the rapid degradation of native vitamin C.
Synthesis Route: Produced via phosphorylation of L-ascorbic acid followed by neutralization with magnesium hydroxide, yielding industrial-grade purity (≥98%).
Acts as a pro-vitamin C: Undergoes enzymatic hydrolysis in skin cells to release active L-ascorbic acid.
Exerts antioxidant effects by scavenging free radicals and inhibits tyrosinase to reduce melanin synthesis, with additional collagen-promoting activity.
Cosmetic Chemistry: Dominant use in whitening serums, moisturizers, and sensitive-skin formulations (concentrations 1–10%), compatible with hyaluronic acid, niacinamide, and peptides.
Personal Care Products: Added to sunscreens, baby skincare, and after-sun products for its gentle antioxidant and soothing properties.
Pharmaceutical & Food Additives: Used as a stable vitamin C supplement ingredient and food antioxidant (compliant with FCC/USP standards) to preserve product quality.
Quality Standards: Meets global regulations (FDA, EU EC 1223/2009) with heavy metal limits (≤10 ppm) and no detectable ascorbic acid degradation products.
Storage Requirements: Packaged in airtight, light-resistant HDPE or aluminum containers, stored at 15–25°C in dry conditions (shelf life 24–36 months).
Safety Profile: Low toxicity (LD₅₀ > 5000 mg/kg, oral rat) with no skin/eye irritation; industrial handling requires basic PPE (gloves, dust masks) to prevent inhalation.
Magnesium ascorbyl phosphate is a stabilized, synthetically derived version of vitamin C. It is as effective as vitamin C in regulating collagen biosynthesis, and as an anti-oxidant.
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