CAS 19829-74-4 appears in our catalog under these names: 4,6–Dihydroxybenzene–1,3–dicarboxylic acid, 4,6-Dihydroxyisophthalic acid 97%, 4,6-Dihydroxyisophthalic acid, 98%, 98%, 4,6-Dihydroxyisophthalic acid, 95%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 10g, 25g, 5g, 250mg, 1g, 100g, 50g.