Magnesium Ascorbate Phosphate-CAS 113170-55-1
Product Name: Magnesium Ascorbate Phosphate
Abbreviation: MAP
INCI Name: Magnesium Ascorbate Phosphate
CAS No.: 113170-55-1
Grade: Cosmetic Premium Grade (Stable Whitening & Antioxidant Special)
Purity: ≥99.0%
Appearance: White Fine Crystalline Powder, Uniform Fineness, Dry Without Caking, Odorless, Pure Texture Without Impurities
Molecular Formula: C₁₂H₁₂MgO₁₄P₂
Molecular Weight: 470.46
MOQ (Minimum Order Quantity): 25KG
Solubility: Excellent water solubility, completely soluble in water-phase formulas; ultra-high stability in full pH range, not easy to oxidize and yellow; excellent compatibility with various skincare active ingredients, easy formula deployment and industrial mass production
Core Efficacy: Efficiently inhibit tyrosinase activity and block melanin synthesis, fade pigmentation, dullness and yellowish skin tone; powerful free radical scavenging capacity, resist oxidation and photoaging; promote collagen proliferation, improve fine lines and skin sagging; brighten complexion and improve uneven skin tone
Key Characteristics: Classic second-generation stable vitamin C derivative in skincare industry; completely solves the defects of easy oxidation, discoloration and deactivation of original VC; non-photosensitive, ultra-mild and non-irritating, suitable for all-day use; high skin absorption and conversion rate, stable and long-lasting whitening and anti-oxidation efficacy; no acid irritation, friendly to sensitive skin
Storage Condition: Sealed and stored in dry, cool and ventilated warehouse, avoid high temperature, humidity and strong light exposure; keep tightly sealed after opening to prevent moisture absorption and activity attenuation
Shelf Life: 24 Months
Application: Widely used in whitening essence, brightening toner, antioxidant lotion, anti-aging cream, spot-fading products, daily brightening skincare and photoaging repair functional cosmetic formulas
Magnesium Ascorbate Phosphate, Vitamin C Derivative, Stable VC, Skin Whitening, Antioxidant, Anti-aging, Inhibit Melanin, Brightening Skincare Raw Material
Magnesium Ascorbate Phosphate-CAS 113170-55-1
Cosmetic Grade Magnesium Ascorbate Phosphate is a high-stability second-generation vitamin C derivative, belonging to phosphate-modified stable VC active ingredient.
Different from unstable L-ascorbic acid and partially stable AA2G, MAP adopts magnesium phosphate molecular modification technology, which greatly enhances the chemical stability of vitamin C, completely avoids oxidation yellowing and activity loss in formulas, and realizes long-term stable efficacy of finished products.
It has excellent water solubility and skin permeability, which can efficiently penetrate into the basal layer of the skin, and be stably converted into active vitamin C by skin enzymes to exert whitening and antioxidant effects.
MAP can target and inhibit tyrosinase, the core enzyme of melanin synthesis, block the melanin production pathway from the source, fade superficial pigmentation, inflammatory acne marks and long-term dull yellow skin, and uniformly brighten skin tone.
In terms of anti-aging and antioxidant, it can scavenge excess free radicals caused by ultraviolet radiation, environmental pollution and skin metabolism, reduce oxidative damage and light aging symptoms, promote collagen and elastic fiber regeneration, improve dry fine lines and mild sagging, and restore skin elasticity and translucency.
With ultra-mild non-acidic formula, no irritation and no photosensitivity, it is safe for long-term morning and night use, and is one of the most cost-effective and versatile stable whitening antioxidant raw materials in the skincare industry.



Key Benefits
• Full pH Ultra-high Stability, No Yellowing & No Deactivation: Phosphate magnesium modified structure, stable in full acid-base range; completely solve the oxidation and yellowing pain points of original VC, ensure finished products have long shelf life and stable efficacy.
• Source Block Melanin, Multi-dimensional Whitening: Efficiently inhibit tyrosinase activity, prevent melanin proliferation and precipitation, fade dull yellowness, acne marks and superficial spots, and create uniform translucent skin tone.
• Strong Antioxidant, Resist Light & Oxidative Aging: Powerful free radical scavenging capacity, reduce skin oxidative damage caused by UV and external pollution, delay skin aging, and improve rough and dull skin texture.
• Boost Collagen Synthesis, Anti-wrinkle & Firming: Activate dermal cell vitality, promote collagen regeneration, improve dry fine lines and mild sagging, enhance skin elasticity and plumpness.
• Non-photosensitive & Ultra-mild, Sensitive Skin Friendly: Non-acidic mild formula, no skin irritation, no photosensitive risk, support all-day long-term whitening care, suitable for all skin types including sensitive skin.
• High Cost Performance & Easy Industrial Production: Excellent water solubility and formula compatibility, stable compounding with various actives, simple formula debugging, high yield rate, suitable for large-scale mass production of daily whitening skincare products.
Applications
• Daily Whitening & Brightening Essence: Core active ingredient of conventional whitening essence, steadily brighten dull skin, fade mild pigmentation, and maintain long-term translucent skin tone.
• Antioxidant Anti-aging Lotion & Cream: Applied in daily anti-aging skincare formulas, scavenge free radicals, delay light aging, improve fine lines and skin slackening, and firm skin texture.
• Refreshing Brightening Toner: Perfect for water-based toner and spray formulas, improve daily dull and yellowish skin, refresh complexion, and realize mild daily brightening care.
• Acne Mark & Pigment Repair Products: Suitable for post-inflammatory pigmentation and red acne mark repair formulas, accelerate melanin metabolism, and fade acne-derived uneven skin tone.
• All-day Anti-photoaging Skincare Series: Used in daytime protective skincare products, effectively resist UV oxidative damage, prevent tanning and light aging, and stabilize bright skin state.
• Compound Mild Whitening System: Compounded with nicotinamide, tranexamic acid, arbutin and soothing ingredients to build multi-effect whitening, antioxidant and repair system, balance efficacy and mildness.
Certificate Of Analysis (COA)
Test Item | Standard Specification | Test Result |
Product Name | Magnesium Ascorbate Phosphate (MAP) | Compliant |
CAS No. | 113170-55-1 | Compliant |
Appearance | White Fine Crystalline Powder | Compliant |
Purity (HPLC) | ≥99.0% | 99.62% |
pH Value (1% Aqueous Solution) | 6.0-8.0 | 7.1 |
Loss on Drying | ≤0.5% | 0.13% |
Residue on Ignition | ≤0.1% | 0.03% |
Heavy Metal (Pb) | ≤1ppm | 0.2ppm |
Arsenic (As) | ≤0.5ppm | 0.1ppm |
Total Bacteria | ≤100CFU/g | Qualified |
Pathogenic Bacteria | Negative | Negative |
Conclusion | Conforms to cosmetic grade quality standard | Qualified |
Frequently Asked Questions (FAQ)
• Q1: What is the MOQ of Magnesium Ascorbate Phosphate?
A1: The standard MOQ is 25KG, and sample orders are supported for formula testing and whitening efficacy trial production.
• Q2: What certification documents can be provided?
A2: Complete COA, MSDS, heavy metal and microbial test reports and full set of customs clearance documents are available to support export declaration and cosmetic product filing.
• Q3: What is the recommended dosage in cosmetic formulas?
A3: Conventional addition dosage is 3%-6% for daily brightening skincare; 6%-12% for high-efficiency whitening and antioxidant essence and cream, adjustable according to product efficacy positioning.
• Q4: What is the difference between MAP and ordinary VC / AA2G?
A4: Original VC is extremely unstable and easy to yellow; AA2G has good stability but limited efficacy concentration; MAP has full pH ultra-stability, no yellowing, higher skin conversion rate, mild neutral pH, more sensitive skin friendly, and higher cost performance for mass formula application.
• Q5: Is MAP suitable for sensitive skin formulas?
A5: Yes. MAP adopts neutral mild non-acidic structure, no irritation to fragile skin, no photosensitive risk, and is the preferred stable whitening raw material for sensitive skin daily brightening care.
• Q6: What ingredients is it suitable for compounding?
A6: It can be perfectly compounded with nicotinamide, tranexamic acid, alpha arbutin, hyaluronic acid and centella extract to build multi-dimensional whitening and antioxidant compound system, improving product comprehensive efficacy and mildness.
• Q7: Do you support stable large-batch supply all year round? A7: Standardized purification production lines ensure sufficient inventory and stable annual output, supporting long-term cooperative orders and customized formula matching services.
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