Seagate international is the world's largest manufacturer of hard drives, the company's use of ultra pure isopropyl alcohol all rely on imports. In May 2007, the company entered the Seagate assessment phase, in the same year in September, reached the Seagate international site audit. In October the company formally began to replace the U.S. company's products, to become Seagate's ultra pure isopropanol qualified suppliers.