Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BUTAZ0LIDIN found under Phenylbutazone Tabl by Ciba Geigy Corp. The National Stock Number assigned to this part is 6505000635573, 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 BUTAZ0LIDIN.