Pressing [R] on a chemical should show any recipes that produce mixtures containing it, which it doesn't do if EMI is installed alongside JEI.

Mods:
Create 0.5.1h
Destroy 0.1.0-snapshot-8
e4mc 5.2.1
EMI 1.1.14
JEI 15.20.0.101
Petrolpark's Library 1.0.6

Which recipes are missing?

for example, isoprene mixture from logs, or the castner process.