Surrogate Standard Back Catalog number: 98607 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 63033 2',3,4-Trichlorobiphenyl (33) Price on request 2517.8-K-ME Caffeine, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 58-08-2 Price on request D454655-1MG 3,4-Dihydroxyphenylglycolaldehyde (Dopegal), 1mg Price on request