4,4’-DDD Back Catalog number: 70099 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 96589 Naproxen, 100µg/ml in MeOH, 1ml Price on request 676776 Metrafenone, 10 µg/ml, Cyclohexane, 10ml Price on request 93724 Semi-Volatile Standard Price on request