Total Water Supply Kit (NELAC) Back Catalog number: 38181 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3130.5-K-IO Pentanoic acid (Valeric), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 109-52-4 Price on request 31026 Bentazon methyl derivative Price on request 677117 Quercitrin, 10mg Price on request