Supplier Page from Thermo Fisher Scientific for trans,trans-2,4-Undecadienal, 90+%, remainder mainly trans,cis isomer
1,2-Ethanedithiol, 95% from Thermo Fisher Scientific
4-Ethylaniline, 99+% from Thermo Fisher Scientific
Emodin, 95%, tech from Thermo Fisher Scientific
Ergosterol, 98% from Thermo Fisher Scientific