Base/Neutrals Surrogate Standard Back Catalog number: 21006 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682923 1-(4-Chlorophenyl)urea, 100 µg/ml, Acetonitrile, Price on request 53002A Nitric Acid Blank Price on request 71094 1,1,1-Trichlorotrifluoroethane Price on request