Methylene Blue has a variety of medicinal uses such as in the treatment of plaque psoriasis, West Nile Virus and other viral diseases. As a phenothiazine dye, it generally shows some level of virucidal activity. Also used in the early detection of potentially malignant lesions of oral mucosa as a dye/stain. Molecular Formula: C16H18ClN3S?xH2O Solubility: DMSO (Slightly), Methanol (Very Slightly) Molecular Weight: 319.85180200000002