Niobium (Nb) Back Catalog number: 57041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9765.11-100-ME MCPB-d3 (4(4-Chloro-2-methylphenoxy-3,5,6-d3)butyric acid) Price on request 20015 CLP Semi-Volatile Acid Surrogate Standard Price on request 94883 Benzo(a)pyrene Price on request