DR. EHRENSTORFER

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4,4'-Benzidine, 100mg

4,4'-Bipyridyl, 500mg

4,4'-DDA, 100mg

4,4'-DDD 10 µg/mL in Cyclohexane, 10ml

4,4'-DDD 100 µg/mL in Cyclohexane, 1ml

4,4'-DDD, 250mg