CAS 1196157-72-8 appears in our catalog under these names: Sulfathiazole 13C6 (phenyl 13C6), Sulfathiazole-13C6, SULFATHIAZOL-13C6, 13C6-Sulfathiazole, Concentration: 100 µg/ml Solvent: Methanol, 13C6-Sulfathiazole. Offered by: Dr. Ehrenstorfer, TRC, Sigma-Aldrich, HPC Standards. Available pack sizes: 10mg, 25mg, 1x1ml, 1x10mg.