Calibration Standard Kit Back Catalog number: 52090 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677919 Profluralin, 100 µg/ml, Ethyl acetate, 1ml Price on request 71895 2-Methylcatechol Price on request 72494 2-Chlorophenoxyacetic acid Price on request