CAS 5135-80-8 appears in our catalog under these names: Chloroacetaldehyde (2,4-dinitrophenyl)hydrazone, 2-Chloroacetaldehyde 2-(2,4-dinitrophenyl)hydrazone, >98%, >98%. Offered by: Biosynth, Chemat. Available pack sizes: 1000mg, 5000mg, 100mg, 250mg, 1g, 5g.