EPA Method 531.2 - Analytes Back Catalog number: 34042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9396.14-100-ME (±)-Atenolol-d7 (N-isopropyl-d7),100 µg/mL,MeOH,1mL, Price on request SC-237106 Thymolphthalexon, 1g Price on request 9411.13-200MG Ritalinic acid (threo), neat, Solvent-neat, Unit 200mg, # of units-1, Cas.no. 54631-24-2 Price on request