EPA Method 508 Standard Back Catalog number: 92358 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0150.16-500-IO 4-n-Butyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 147792-33-4 Price on request 56020 Calcium (Ca) Price on request 15900-3090-100AN5 MCPB, 100µg/ml in Acetonitrile, 5ml Price on request