CAS 3970-35-2 appears in our catalog under these names: Mesalazine impurity 2, 99.60%, 2–Chloro–3–nitrobenzoic acid, 2-Chloro-3-nitrobenzoic acid, 2-Chloro-3-nitrobenzoic acid, 98% , 2-Chloro-3-nitrobenzoic acid, 98%. Offered by: MedChemExpress, GLPBio, Biosynth, Thermo Scientific (Alfa Aesar), Thermo Scientific (Acros). Available pack sizes: Get quote, 100g, 25g, 5g, 50g, 250g, 500g, 1000g.