mTsOH

mTsOH, also known as methylthioninium hydroxide, is a chemical compound with the molecular formula C10H14N2S+OH-. It is a quaternary ammonium salt, which is a type of organic compound that contains a positively charged nitrogen atom bonded to four other atoms or groups. mTsOH is often used as a phase transfer catalyst in organic synthesis, a process where a catalyst is used to facilitate a chemical reaction between two substances that are normally immiscible, or unable to mix. In this role, mTsOH helps to transfer ions or molecules between two phases, typically an aqueous phase and an organic phase. The compound is also used in the synthesis of various pharmaceuticals and agrochemicals. mTsOH is typically prepared by the reaction of methylthioninium chloride with sodium hydroxide. It is a white to off-white crystalline powder that is soluble in water and many organic solvents. The compound is stable under normal conditions but may decompose upon heating or exposure to strong acids. mTsOH is considered to be a hazardous substance and should be handled with care, using appropriate personal protective equipment and following standard safety procedures.