Acid Surrogate Standard Back Catalog number: 23005 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended T536805 p-Tolyl Sulfate Potassium Salt, 1g Price on request 8483.19-500MG Metoprolol tartrate, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 56392-17-7 Price on request 1346.10 cis-4-(2-Hydroxyphenyl)-2-oxobut-3-enoic acid, Please inquire, Solvent-, Unit , # of units-, Cas.no. 31966-72-0 Price on request