The molecule is a member of the class of 2,1-benzoxathioles that is 2,1-benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 4-hydroxy-5-methylphenyl groups. It has a role as an acid-base indicator, a dye and a two-colour indicator. It is a 2,1-benzoxathiole, an arenesulfonate ester, a polyphenol and a sultone.
4-[3-(4-hydroxy-3-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2-methylphenol