CLP Semi-Volatile Internal Standard Back Catalog number: 10019 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12026.6-K-ME Isobutyl acetate,1000 µg/mL,MeOH,1mL, Price on request 2538.14-K-ME Naproxen Price on request 2622.33-50-IO 17 alpha(H),21ß(H)-(22RS)-Trishomohopane , 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 54340-13-5 Price on request