CAS 39635-11-5 appears in our catalog under these names: 3,4-Dihydroxybenzhydrazide, min. 95 %, 5 g, 3,4-Dihydroxybenzhydrazide, 97% , 3,4-Dihydroxybenzohydrazide 95%, Benzoic acid, 3,4-dihydroxy-, hydrazide, 98%, 98%, 3,4-Dihydroxybenzhydrazide, min. 95 %, 10 g. Offered by: Roth, Thermo Scientific (Alfa Aesar), Ambeed, Chemat, Fluorochem. Available pack sizes: 5g, 25g, 100g, 250mg, 1g, 10g, 50g.