Supplier Page from Thermo Fisher Scientific for Calcium oxalate monohydrate, Puratronic:r, 99.9985% (metals basis), (excluding 25ppm max alkali earths)
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ellagic acid, 97% from Thermo Fisher Scientific
Ethoxymethylenemalononitrile, 98% from Thermo Fisher Scientific
Ethyl butyrate, 99% from Thermo Fisher Scientific