Ohio Valley Specialty Company is a small, privately owned business located in Marietta, Ohio. With more than 50 years of experience in the field of gas chromatography, we are sure to be able to help you with any of your gas chromatography needs. Ohio Valley Specialty Company has been manufacturing liquid phases since 1966. OV phases such as OV-1, OV-17, and OV-624 can be found in GC labs around the world.