EPA Method 548.1 Analyte Back Catalog number: 30177 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0681.28-200-IO (24R)-24-Methyl-3,5-cyclocholestane and (24R)-24-Ethyl-3,5-cyclocholestane, 200µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 36545-67-2 / '38776-72-6 Price on request 12066.22-100MG Doxycycline hyclate,neat,neat,100mg, Price on request 2126.12-K-IO Arochlor 1242 , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 53469-21-9 Price on request