L-Histidine Back Catalog number: 72181 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11410.17-K-ME Norhydrocodone hydrochloride,1000 µg base/mL,MeOH,1mL, Price on request 0230.32-30-TB Naphtho[2,3-a]coronene, 30µg/mL, Solvent-1,2,4-Trichlorobenzene, Unit 1mL, # of units-1, Cas.no. 190-74-9 Price on request 30196 EPA Method 532 Standard Price on request