Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC00172 3668 70 found under Perphenazine Tablet by Schering Corp. The National Stock Number assigned to this part is 6505005843669, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NDC00172 3668 70.