Subheading 293510: Sulphonamides; N-methylperfluorooctane Sulph …etc.
Subheading 293520: Sulphonamides; N-ethylperfluorooctane Sulpho …etc.
Subheading 293530: Sulphonamides; N-ethyl-n-(2-hydroxyethyl) Perfluoroocta… etc.
Subheading 293540: Sulphonamides; N-(2-hydroxyethyl)-n-methylperfl … etc.
Subheading 293550: Sulphonamides; other Perfluorooctane Sulphonamides
Subheading 293590: Sulphonamides; N.E.C. in Heading no. 2935