CAS 306936-12-9 appears in our catalog under these names: Ethyl 3-(chlorosulfonyl)isonicotinate, 95%, Ethyl 3-(chlorosulfonyl)isonicotinate, 95% , Ethyl 3-(chlorosulfonyl)isonicotinate 98%, Ethyl 3-(chlorosulfonyl)isonicotinate, 98%. Offered by: Combi-blocks, Thermo Scientific, Ambeed, Fluorochem. Available pack sizes: 250mg, 1g, 100mg.