EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9535.12.50-IO 2,2',3,4,4',5,5',6-Octabromobiphenyl, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request 0938.8-K-IO Benzothiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 95-15-8 Price on request 677209 D8-Ciprofloxacin hydrochloride hydrate, 10mg Price on request