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Magnesium Ascorbyl Phosphate (MAP)




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Vitamin C - Magnesium Ascorbyl Phosphate (MAP)
CAS No. 113170-55-1

Magnesium Ascorbyl Phosphate is a stable, water soluble derivative of Vitamin C (L-Ascorbic acid mono-dihydrogen phosphate magnesium salt). Unlike L-Ascorbic Acid, it does not readily degrade in formulas containing water.  It is considered light-stable and oxygen-stable. Studies of MAP in aqueous solutions indicate it retains over 95% of its potency at 40°C without any pH adjustment.

By inhibiting tyrosinase activity, MAP is capable of suppressing skin pigmentation, making it effective in whitening dark skin, or areas of dark skin.  It should be noted, one study indicated it might be needed at a concentration of 10% to be effective at inhibiting melanin production1.

Unlike Ascorbyl Palmitate, Magnesium Ascorbyl Phosphate (MAP) appears to have the same potential to boost skin collagen synthesis as does Ascorbic Acid, but at lower concentrations. For those with sensitive skin or those wanting to avoid the exfoliating effects of highly acidic Ascorbic Acid, MAP may be the preferred choice.

Formulation Guidelines

  • Magnesium Ascorbyl Phosphate (MAP) may discolor in formulations with a pH below 6, so is best used in products with a final formulation pH between 6.0 - 7.0.
  • The solubility of MAP in water is 154g/l at 25C/77F (that's at most 15.4%)
  • MAP is stable at 80C/176F for up to 20 hours; this means that it should withstand heating to this temperature for short periods in formulations without a problem.  Therefore, it can be added to the water phase prior to heating.
  • You can also predisperse it in a small amount of distilled water and add at the end of the formulation process.
  • If you're having trouble dissolving MAP in water, warming the solution to about 40°C (104°F) will help.

Applications

  • Suncare and after-sun products
  • Makeup products
  • Skin lightening products
  • Anti aging products
  • Creams and lotions

This is a cosmetic raw material and is meant for external use only in cosmetic formulations.  As with all of our materials, it should not be taken internally.


Typical usage rate:  0.2 - 3, up to 10%
Appearance:  White to off-white powder with a mild odor
pH:  7.0 - 8.5
Solubility:  Soluble in water (154g/l), mix well, allow time for lumps to dissolve
Shelf Life:  Two years
Country of Origin: China


INCI: Magnesium Ascorbyl Phosphate

1Source: Photochemistry and Photobiology, June 1998, pages 669–675; and Journal of Pharmaceutical and Biomedical Analysis, March 1997, pages 795–801

Here you will find Material Safety Data Sheets (MSDS) and Technical Data Sheets. The files are in PDF format. To access a file, click on the relevant button or the file name. For your convenience, it will open up in a new browser window.

Please note: You must have Acrobat Reader to view the files listed here. If necessary, the Acrobat Reader link will directed you to a page where it can be downloaded.

Technical Data

 
Material Safety Data Sheet (MSDS)

Magnesium Ascorbyl Phosphate (MAP) MSDS

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I just received the L-Ascorbic Acid now, boy, it melted so quickly. i'm very, very pleased with this product. I wish I'd listened to the testimonials on-line so that my other L-Ascorbic Acid I bought from another retailer wouldn't be wasted. It takes too long before it melts even if its a fine powder. It is good for drinking with beverage as a Vitamin C supplement, but if you use it for facial serum - forget about it because the melting takes forever unless you mix it with hot water, then what's the point of doing it - we all know that Vitamin C oxides with hot temperatures.
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