Methadone/Methaqualone/Propoxyphene Back Catalog number: 96626 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DTPRP Tri-n-propyl phosphate-d21, 1.2ml x 50ug/ml, toluene Price on request S-4525-K-ME Organotin Mix 6, 1000µg/ml in MeOH, 1ml Price on request 32103 EPA Method 551.1 Internal Standard Price on request