COD Calibration Standard Back Catalog number: 50241 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71625 1,4-Pentadiene Price on request 30109 EPA Method 552.2 - Surrogate Standard Price on request 681198 2-(2-Chlorobenzylidene)malononitrile, 100mg Price on request