Internal Standard Stock Solution, 1.2ml, nonane Back Catalog number: EPA-1668IS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 679982 (-)-Nicotine, 100 µg/ml, Methanol, 1ml Price on request 673067 Coumarin, 100mg Price on request 675484 2-Nitrobenzaldehyde, 100mg Price on request