Sulphonamides

293510 Sulphonamides; N-methylperfluorooctane sulphonamide 293520 Sulphonamides; N-ethylperfluorooctane sulphonamide 293530 Sulphonamides; N-ethyl-N-(2-hydroxyethyl) perfluorooctane sulphonamide 293540 Sulphonamides; N-(2-hydroxyethyl)-N-methylperfluorooctane sulphonamide 293550 Sulphonamides; other perfluorooctane sulphonamides 293590 Sulphonamides; n.e.c. in heading no. 2935