ASTM D-4815 Calibration Mix #1 Back Catalog number: 51058 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-D40 Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane Price on request 675405 4-Chlorophenol, 10 µg/ml, Methanol, 10ml Price on request EPA-23SSS Surrogate Standard Stock Solution, 1.2ml, nonane Price on request