The Chemical Synthesis Machine is a machine used for chemically "crafting" items and molecules, using their base molecules and atoms.
This machine turns any element or compound in to their original item or another item.
This machine requires Buildcraft power to use, which can be provided using either Buildcraft's own conductive pipe, placing it next to the power tap on a reactor from the Big Reactors Mod, or using Thermal Expansion energy conduits. It has an internal storage of 900,000 MJ, and a maximum usage of 200 MJ/t. Energy stored and used can be viewed using the "Energy" tab to the right of the GUI.