CAS 52010-22-7 appears in our catalog under these names: 4–Chlorophthalide, 4-Chlorophthalide 96%, 4-Chlorophthalide, 98%, 98%, 4-Chloroisobenzofuran-1(3H)-one, 95%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 2g, 500mg, 250mg, 1g, 5g, 10g, 100mg, 25g.