Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC00172-2812-08 found under Chlorzoxazone And A by Zenith Laboratories Inc. The National Stock Number assigned to this part is 6505011052899, 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 NDC00172-2812-08.