CAS 2057-82-1 appears in our catalog under these names: Isobutyraldehyde-2,4-dinitrophenylhydrazone, Isobutyraldehyde 2,4–Dinitrophenylhydrazone, Isobutyraldehyde 2,4-Dinitrophenylhydrazone, >98.0%(T), 1-(2,4-Dinitrophenyl)-2-(2-methylpropylidene)hydrazine, 98%, 98%. Offered by: Dr. Ehrenstorfer, GLPBio, TCI, Chemat. Available pack sizes: 100mg, 1g, 25g, 5g, 10g.