Caffeine Back Catalog number: 98416 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2535.10-K-ME (2RS)-2-(4-Methylphenyl)propanoic acid, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 938-94-3 Price on request 3883.2-100MG Azodicarbonamide, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 123-77-3 Price on request DF-IS-F200 Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request