Selenium (Se) Back Catalog number: 58034 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9453.9-100-MT 2,4-Dimethyl acetic acid methyl ester, 100µg/mL, Solvent-MTBE, Unit 1mL, # of units-1, Cas.no. 55954-23-9 Price on request 92269 Citric acid [2% wt] Price on request 72242 n-Propyl gallate (PG) Price on request