

Murexide (Highly Pure) by Molecular Depot is a murexide, the ammonium salt of purpuric acid. Murexide forms coloured complexes with calcium and other divalent metal ions, changing from violet to orange-red on binding. It is used as a metal indicator in complexometric titration of calcium and nickel and as a colorimetric calcium indicator. Each unit contains 1 g. MBP supplies Molecular Depot research reagents to research labs in the United States, Canada and worldwide.