p-Xylene, certified, 1ml Back Catalog number: C17945200 Availability: In the manufacturer's stock Price on request - + Recommended 91206 EPA Method 8310 Surrogates, 50µg/ml in MeChl, 1ml Price on request NK-IS-J5 Internal Standard Solution, 1.2ml, nonane Price on request 72217 Nifedipine Price on request