(2,4,6-Triamino-5-pyrimidinylazo)benzene-4-sulfonic acid 2877-65-8 5-25-18-00289 (Beilstein Handbook Reference) BRN 0333812 Benzenesulfonic acid, 4-((2,4,6-triamino-5-pyrimidinyl)azo)- P-64