Calibration Standard Set Back Catalog number: 52042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 90975 1,2:3,4-Diepoxybutane Price on request 10454.21-100MG 2,2-Bis[3,5-dibromo-4-(2,3-dibromopropoxy)phenyl]propane, Techn. 95%,neat,neat,100mg, Price on request 52021 Calibration Standard 1 Price on request