Methylammonium bromide in an organic halide with the formula of CH<sub>3</sub>NH<sub>3</sub>Br. It is the salt of methylammonium and bromide. It is a colorless, water-soluble solid.
The methylammonium halides are precursors to perovskite solar cells, which are being evaluated.
In 2019 research was conducted into determining if a solution containing Methylammonium Bromide (MABr) was effective at testing for the presence of lead. Researchers dumped lead bromide directly into a solution of MABr and observed fluorescence. CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> exhibits fluorescence under illumination with 365nm light. The technique was found only generate fluorescence when lead ions were present. Yan et al. also painted a lead bromide solution onto a paper surface and observed fluorescence when MABr was subsequently added to the paper.