Our Amidite Diluent Station usually comes with a 38 mm bottle cap which fits directly onto the standard 4 liter bottle of Acetonitrile that is sold in the USA and in some other countries.

We also offer an adapter that allows you to use a bottle of Acetonitrile with a 45 mm cap.

If you are concerned about the larger bottle of Acetonitrile becoming contaminated with water because it takes a long time to use, we offer Molecular Traps which are designed to remove moisture form solvents and to maintain a very low moisture level in solvents such as Acetonitrile.