1- Methylimidazole/THF, Capping Formula B Contains 4 CapB filled Trap-Pak™ bags. Cap B is a mix of NMI (N-methylimidazole) and THF (tetrahydrofuran). Form: Liquid Platform: 3900 DNA Synthesizer Product Size: 4 x 450 mL Chemical Name: 1-methylimidazole/tetrahydrofuran Regulatory Statement: For Research Use Only. Not for use in diagnostic procedures. 4 × 450 ml