Caffeine, 100µg/ml in MeOH, 1ml Back Catalog number: 97536 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 681476 Hexazinone, 10.0 µg/ml, Acetonitrile, 10ml Price on request 50297 0.020 N Sodium Hydroxide Price on request 70462 1,3-Dimethyl-2-nitrobenzene Price on request