CLP Semi-Volatile Base/Neutral Surrogate Std Back Catalog number: 21016 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673099 Propyphenazone, 250mg Price on request 8995.21-100-ME Cortisol, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 50-23-7 Price on request 58239 Yttrium (Y) Price on request