Cephalosporins Back Catalog number: 67041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70410 4,4’-Methylene bis(2-chloroaniline) Price on request DF-LCS-B40 Mass-Labelled PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 79673 Pentachloroanisole Price on request