Internal Standard for AB SIM Back Catalog number: 94541 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673969 1H-Benzotriazole, 100mg Price on request 685017 Nitroguanidine, 100 µg/ml, Acetonitrile, 1ml Price on request BA057-10 Zilpaterol-13C3 hydrochloride, 10mg Price on request