CAS 288-32-4 appears in our catalog under these names: Imidazole, 99% , Imidazole, ACS, 99+% , Imidazole, 98.5+% (dry basis), Ultrapure, Thermo Scientific , Imidazole, 0.5M buffer soln., , Imidazole-buffered saline (5X) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 2500g, 100g, 500g, 1kg, 5kg, 100ml, 250ml, 500ml.