EPA 1638Mix A Back Catalog number: 52144 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679464 Atrazine, 100 µg/ml, Methanol, 1ml Price on request 9405.24-100-ME Carvedilol-d4 (ethyl-d4), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1133705-56-2 Price on request 50228 Mix #1 Price on request