Method 4 Standard 1 Back Catalog number: 93233 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9424.8-K-ME Valproic acid, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 99-66-1 Price on request 677863 Cyprosulfamide, 10.0 µg/ml, Acetonitrile, 10ml Price on request C755392 trans-p-Coumaric-d6 Acid, 5mg Price on request