Supplier Page from Thermo Fisher Scientific for Tris(hydroxymethyl)aminomethane, ACS, 99.8-100.1% (Assay, dried basis)
Hesperidin, 97%, includes analogeous compounds from Thermo Fisher Scientific
meso-Erythritol, 99% from Thermo Fisher Scientific
Riboflavin, 98% from Thermo Fisher Scientific
Sulfanilamide, 98% from Thermo Fisher Scientific