Internal Standard Stock Solution, 1.2ml, nonane Back Catalog number: EPA-1668IS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 679816 Sulfamethoxazole, 100 µg/ml, Methanol, 1ml Price on request 675440 D-Melibiose, 250mg Price on request 56140 Anions Mix Price on request