MCPA Back Catalog number: 79523 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 51044 MA - EPH Matrix Spike Rev 1.0/1.1 Price on request 8866.9-K-IO 5-Methylquinoxaline, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. Price on request 96629 Opiate Standard Price on request