Retention Time Verification Standard Back Catalog number: 51172 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9405.24-K-ME Carvedilol-d4 (ethyl-d4), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1133705-56-2 Price on request 8466.3-100 Ethylenethiourea, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 96-45-7 Price on request A17446000AL-100 Theophylline, 100μg/mL in Acetonitrile, 1ml Price on request