magnesium citrate (3:2) magnesium citrate (3:2) 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 a not very water soluble salt leaving a bitter taste in a dry state, also there is an exothermic heat generation when water is added, which is "most disagreeable when taken orally." it contains 16.2% elemental magnesium by weight. however, it can naturally only be available as nonahydrate (with 9 molecules of water to every molecule of trimagnesium dicitrate). this hydrated form only contains 12% elemental magnesium by weight. magnesium citrate (3:2) names preferred iupac name trimagnesium bis(2-hydroxypropane-1,2,3-tricarboxylate) identifiers cas number 3344-18-1 y 3d model (jsmol) interactive image chebi chebi:131389 y chemspider 2925651 echa infocard 100.020.086 ec number 222-093-9 kegg d03265 pubchem cid 3693607 unii rho26o1t9v y inchi inchi=1s/2c6h8o7.3mg/c2*7-3(8)1-6(13,5(11)12)2-4(9)10;;;/h2*13h,1-2h2,(h,7,8)(h,9,10)(h,11,12);;;/q;;3*+2/p-6key: plsarikbyipypf-uhfffaoysa-hinchi=1/2c6h8o7.3mg/c2*7-3(8)1-6(13,5(11)12)2-4(9)10;;;/h2*13h,1-2h2,(h,7,8)(h,9,10)(h,11,12);;;/q;;3*+2/p-6key: plsarikbyipypf-cyfpfddlaw smiles c(c(=o))c(cc(=o))(c(=o))o.c(c(=o))c(cc(=o))(c(=o))o... properties chemical formula c12h10mg3o14 molar mass 451.113 g·mol−1 appearance white powder except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). y verify (what is yn ?) infobox references