7-Methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (mTBD) is a bicyclic strong guanidine base (pKa = 25.43 in CH3CN and pKa = 17.9 in THF).

[3] mTBD, like 1,5,7-triazabicyclo[4.4.0]dec-5-ene and other guanidine super bases, can be used as a catalyst in a variety of chemical reactions.

[4] It also reacts with CO2,[5] which could make it useful for carbon capture and storage.

[6] When brought into contact with some acids, mTBD reacts to form an ionic liquid.

Some of these ionic liquids can dissolve cellulose.