QC Standard 4 Back Catalog number: 52087 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72345 1-(3,5-Dichlorophenyl)urea Price on request 73258 Omeprazole, 1000µg/ml in MeOH, 1ml Price on request 59405 Cations Solution C Price on request