Standard #1 Back Catalog number: 59215 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S15819982DD-2.5 Oxytetracycline 13C22,15N2 dried down 2.5 µg/mL, 5 x 1ml Price on request 66157 2,3,3’,4,4’,5’-Hexachlorobiphenyl (157) Price on request 71156 Triethylene glycol Price on request