Dry 2,4-Dinitrophenylhydrazine Disposal
2,4-Dinitrophenylhydrazine, 2,4-DNP, DNPH, or Brady's Reagent when wet or in solution is fairly innocuous, however, if allowed to dry out can explode if subjected to shock, friction, or heat. Dry 2,4-DNP must therefore be re-hydrated as quickly as is safely possible. Whilst this sounds easy, the process is beset by difficulties. A drop of just a few inches is sufficient to trigger an explosion, as is the friction caused by the unscrewing of the cap on threads contaminated with dry crystals.
If you discover Dry 2,4-DNP, you must immediately protect against physical damage. Store in a cool, dry well-ventilated location, away from any area where the fire hazard may be acute. Outside or detached storage is preferred. Separate from incompatibles, and if possible submerge the whole container in water, in a plastic container, weighting as necessary with non-metallic weights.
Containers of this material are hazardous when empty since they retain product residues; observe all warnings for the product.
Tradebe Labwaste offer a re-hydrating service. Our highly experienced specialists will make your 2,4-Dinitrophenylhydrazine safe prior to disposal without drama or disruption, and the material is usually removed from site within an hour of arrival. In the first instance, please call our chemistry team on 01455 616 673.