CAS 40020-01-7 appears in our catalog under these names: 6-Chloro-4-hydroxy-3-phenyl-pyridazine, 6-Chloro-4-hydroxy-3-phenyl-pyridazine 100 µg/mL in Acetonitrile, Pyridafol, 6-Chloro-3-phenylpyridazin-4-ol, 95%, 95%, Pyridafol, Concentration: 100 µg/ml Solvent: Acetonitrile. Offered by: Dr. Ehrenstorfer, Chemat, Sigma-Aldrich, HPC Standards. Available pack sizes: 10mg, 1ml, 100mg, 25mg, 250mg, 1x10ml, 1x25mg, 1x5ml.