2877-70-5 4-25-00-04660 (Beilstein Handbook Reference) BRN 0317112 Benzenesulfonic acid, p-((2-amino-4,6-dimethyl-5-pyrimidinyl)azo)- PY-68 p-((2-Amino-4,6-dimethyl-5-pyrimidinyl)azo)benzenesulfonic acid