he group or compounds or the general formula where R is an aryl group, x is a member oi the .group consisting of hydrogen, and COOY groups, if is a member or the group consisting of hydrogen and alkali-metal atoms. and Z is a member of the group consisting of hydrogen, al- scorch and mildew, as a germicidal rinse, for bottle sterilization, for desizing textiles, oxidizing vat dyes, clearing cotton