EPA Method 630/630.1 Stock Solution #1 Back Catalog number: 40024 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1570.34-100-ME Pseudomorphine (free base), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 125-24-6 Price on request 79358 4,4’-Dichlorobenzophenone Price on request D436452-1MG Diclofenac-d4, 1mg Price on request