COD Calibration Standard

6-n-Heptylnaphthalene-2-carboxylic acid, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 66473-01-6

1,2,4,5-Tetrachlorobenzene

GRO Standard C6-C10, 2000µg/ml in MetChloride, 1ml