EPA Method 625 Base/Neutrals Mix #1 Back Catalog number: 19114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9653.23-100-AN Aripiprazole-d8 (butyl-d8), 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. Price on request 2538.14-100-ME Naproxen, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 22204-53-1 Price on request C482501 Ciprofloxacin-d8, 2,5mg Price on request