Magnesium Ascorbyl Phosphate

Magnesium Ascorbyl Phosphate, a stable vitamin C for water-based care

Magnesium Ascorbyl Phosphate, often shortened to MAP, is a white powder with the INCI Magnesium Ascorbyl Phosphate. It is a vitamin C derivative made for formulators who want vitamin C in a water-based product without the fast browning that pure ascorbic acid shows. It dissolves in water and is far more stable in a finished serum or cream, which makes it one of the easiest vitamin C forms to work with. It is sold as a cosmetic active raw material from a 10 g trial up to 1 kg bulk.

Brightening and daily care uses

MAP is used in serums, toners, gels and creams that aim for a brighter, more even-looking complexion, and in daily antioxidant care. Typical levels are about 1 to 3% in everyday products and up to about 5% in more concentrated brightening formulas. It is gentle on the skin feel and does not need a very low pH to perform well.

Combinations that work

Niacinamide is a popular partner in tone-evening serums, and hyaluronic acid liquid adds a moisturizing layer to a vitamin C gel. If you need vitamin C in an oil or balm, the oil-soluble Ascorbyl Palmitate is the better fit. All three sit in our cosmetic actives catalog.

Formulating with MAP

Dissolve the powder in the water phase and keep the finished pH around 6 to 7, where MAP is most stable. Add it during cool-down if possible and avoid strong acids. Use airless or opaque packaging for the finished product and store the raw powder dry and tightly closed. For wholesale volumes above 1 kg, request a bulk quote from the supplier specification. It ships from Florida, usually within 1 to 2 business days, in the pack sizes shown above, and US shipping is free on orders of $50 or more.