CAS 151-21-3 appears in our catalog under these names: Sodium n-dodecyl sulfate, 99% (dry wt.), water <2% , Sodium dodecyl sulfate (SDS), 95+%, Thermo Scientific , Sodium n-dodecyl sulfate (SDS) , Sodium n-dodecyl sulfate, 97%, for electrophoresis , Sodium n-dodecyl sulfate, 99%, Molecular Biology Grade . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 25g, 50g, 100g, 250g, 500g, 1kg, 5kg, 250ml.