Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC54569-0552-00 found under Chlorthalidone Tablets Usp by Merck Sharp And Dohme Corp. The National Stock Number assigned to this part is 6505011355696, 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 NDC54569-0552-00.