L-Phenylalanine Back Catalog number: 72233 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended EN-1948STK PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 54212 Ammonia as (NH4+) Price on request 677923 Pyrethrins, 10 µg/ml, Ethyl acetate, 10ml Price on request