Magnesium citrate (3:2)

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Magnesium citrate (3:2)
Trimagnesium citrate 2D.svg
IUPAC name
2-hydroxypropane-1,2,3-tricarboxylic acid; magnesium
3D model (JSmol)
ECHA InfoCard 100.020.086
EC Number 222-093-9
Molar mass 451.11 g·mol−1
Appearance White powder
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Magnesium citrate (3:2) (3 magnesium atoms per 2 citrate molecules), also called trimagnesium dicitrate, trimagnesium citrate, or the ambiguous name magnesium citrate. The substance magnesium citrate usually has water molecules attached to it. It is a (hydrated) salt of magnesium and citric acid. It is not very soluble in water and has a bitter taste.[1] It contains 16.2% magnesium by weight. However, it can naturally only be available as nonahydrate (with 9 molecules of water to every molecule of Magnesiumcitrate). This hydrated form will only contain 12% magnesium (the metal) on weight base.


  1. ^ US patent 4959222, Karl J. Nadland et al, "Magnesium additive for nutrients, feed, and medicaments", issued 1990-Sept-25