Internal Standard Stock Solution, 1.2ml, nonane Back Catalog number: EPA-1668IS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 673350 Methamidophos, 10.0 µg/ml, Acetonitrile, 10ml Price on request 679282 Metamizole sodium monohydrate, 100mg Price on request S-4193-2K-10ME F-BTEX ISTD Mixture 4 Analytes, each 2000 µg/mL in methanol; units: 1x 4.5mL, 1x10mL 2017.6 Fluorobenzene [462-06-6] 2018.7 2-Fluorotoluene Price on request