Gelest, manufacturers and suppliers of high-growth materials such as silicones and organosilanes, reported it has completed its previously announced sale of Gelest Intermediate Holdings to Mitsubishi Chemical America Inc., the U.S. subsidiary of Mitsubishi Chemical Corp. The transaction was announced in April. Gelest Intermediate Holdings is the parent company of Gelest Inc., which additionally develops and manufactures metal organics, and chemical vapor deposition, coating, and UV materials, with applications in medicine/medical research, the life sciences, and photovoltaics. In a separate move, Gelest promoted Jonathan Goff to the role of CTO. Goff has been with Gelest since 2009, most recently managing its Polymer Development, Technical Services, Silanes and Metal-Organic, Research Engineering, and Quality Control groups.