Internal Standard Stock Solution, 1.2ml, nonane Back Catalog number: EPA-1668IS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended CFN98838 Kaempferol, >98%, 20mg Price on request XA17875000AL Trimethoprim, 100μg/mL in Acetonitrile, 1ml Price on request 95640 Nitrosamines Standard Price on request