Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC51991-0934-98 found under Labetalol Hydrochlo by Amerisourcebergen Corporation. The National Stock Number assigned to this part is 6505012447982, 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 NDC51991-0934-98.