Supplier Page from Thermo Fisher Scientific for Pyridine hydrobromide perbromide, tech. 90%
2-Mercapto-1-methylimidazole, 98% from Thermo Fisher Scientific
Methyl chloroformate, 99% from Thermo Fisher Scientific
Sulfanilamide, 98% from Thermo Fisher Scientific
Sulfur trioxide pyridine complex, technical, 48-50% active SO3 from Thermo Fisher Scientific