EPA 1620 Standard 4 Back Catalog number: 53142 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2048.7-10K-MEX5 alpha alpha alpha-Trifluorotoluene, Calibration (Surrogate) Standard, 10000µg/mL, Solvent-methanol, Unit 1mL, # of units-5, Cas.no. 98-08-8 Price on request 95989 Method 8121 - Surrogate Standard Price on request SC-477640 trans-Phytoene, 2,5mg Price on request