QC Standard 5 Back Catalog number: 52088 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11647.9-K-ME (+/-)-Normetanephrine hydrochloride,1000 µg base/mL,MeOH,1mL, Price on request 96502 Norfentanyl hydrochloride Price on request 11984.28-10MG (±)-Methoxyverapamil hydrochloride,neat,neat,10mg, Price on request