Metals Mix #4 Back Catalog number: 59398 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12100.2-250MG Ethephon,neat,neat,250mg, Price on request 682032 Hexadecanoic acid-methyl ester, 250mg Price on request DF-IS-A40 Mass-Labelled PCDD Internal Standard Solution, 1.2ml x 40ng/ml, nonane Price on request