CAS 1773-44-0 appears in our catalog under these names: o-Tolualdehyd-2,4-dinitrophenylhydrazone, o-Tolualdehyde 2,4-Dinitrophenylhydrazone, >98.0%(HPLC)(T), 2-Methylbenzaldehyde 2-(2,4-dinitrophenyl)hydrazone, 98%, 98%, o-Tolualdehyde-2,4-DNPH, o-Tolualdehyde-2,4-DNPH, Concentration: 10.0 µg/ml Solvent: Acetonitrile. Offered by: Dr. Ehrenstorfer, TCI, Chemat, HPC Standards, Fluorochem. Available pack sizes: 100mg, 1g, 10g, 250mg, 1x100mg, 1x10ml, 5g.