Caffeine Back Catalog number: 96175 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2089.14-K-IP 4-Fluoro-3-methylphenol-PFB, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. Price on request 1240.7-K-ME n-Heptane, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 142-82-5 Price on request 1113.12-K-T 5-Nitroacenaphthene,1000 µg/mL,toluene,1mL, Price on request