AA Standard #1 Back Catalog number: 59227 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676985 Valproic acid, 100mg Price on request 678511 Tetramethrin, 100 µg/ml, Acetonitrile, 1ml Price on request S-11064A1-1ML Ametryne, 100µg/ml in Acetonitrile, 1ml Price on request