Interference Standard 4 Back Catalog number: 52041A Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C14074000 delta-HCH, certified, 50mg Price on request 677419 1-(4'-Sulfophenyl)-3-carboxy-5-pyrazolone, 50mg Price on request 0012.22-200-T Napht[1,2-a]anthracene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 195-06-2 Price on request