Methyl violet 1%, aqueous is an aqueous solution of gentian violet B/methyl violet (C.I.: 42555) (CAS No.: 548-62-9). It is widely used in medical diagnostics, histology, and scientific laboratories.

Methyl violet is a triphenylmethane dye that selectively stains nucleic acids, especially RNA, in cells and tissues. It is a cationic dye that binds to negatively charged macromolecules, such as RNA, DNA, and proteins. In histology, aqueous solutions of methyl violet are preferred to minimize the formation of precipitates in tissues.

Methyl violet 1% aqueous is used to stain tissues for the detection of RNA and to identify bacteria in microbiology research, among other applications. It is also used in scientific laboratories to stain cell nuclei and to detect nucleic acids in various biological samples.

Possible results of using methyl violet 1% aqueous include selective staining of nucleic acids, which allows identification of specific cell types or structures. It can also aid in the detection of bacteria in microbiological research.