0.54 mg 1, 2,5,8-tetrahydroxyanthraquinone 0.54 mg 2,5-dihydroxy p-quinone 0.90 mg croconic acid 1.62 mg catechol 1.81 mg croconic acid polymer 2.0 mg p-tert. butyl catechol 2.70 mg tetrahydroxyquinone 5.43 mg tetrahydroxyquinone polymer Composition for every 1.0 ml H(2)O : 13.5 mg sodium sulfite KOH to pH 9.5-10.0 NSC300901