1-21-00-00203 (Beilstein Handbook Reference) 1970-40-7 2,3,5-Trichloro-4-hydroxypyridine 2,3,5-Trichloro-4-pyridinol 4-Hydroxy-2,3,5-trichloropyridine 4-Pyridinol, 2,3,5-trichloro- BRN 0383795 Caswell No. 882G Daxtron EPA Pesticide Chemical Code 482800 PYRICLOR