Supplier Page from Thermo Fisher Scientific for Sulfur trioxide pyridine complex, technical, 48-50% active SO3
2-Mercaptobenzothiazole, 95% from Thermo Fisher Scientific
Adipic acid, 99% from Thermo Fisher Scientific
Allopurinol, 98% from Thermo Fisher Scientific
Methyl 4-(chloroformyl)butyrate, 98% from Thermo Fisher Scientific