2,4-DNP 2,4-dinitrophenylhydrazine Disposal 


24 DNP or Brady’s Reagent is a red to orange solid. It is a substituted hydrazine, and is often used in A-Level chemistry lessons to qualitatively test for carbonyl groups associated with aldehydes and ketones. 
The hydrazone derivatives can also be used as evidence toward the identity of the original compound. The melting point of the derivative is often used, with reference to a database of values, to determine the identity of a specific carbonyl compound. It is relatively sensitive to shock and friction; it is a shock explosive so care must be taken with its use. To reduce its explosive hazard, it is supplied wet. 


Due to some high profile incidents and controlled explosions at several schools, all holders of stocks of 2,4-DNP, 2,4-dinitrophenylhydrazine are being reminded to check the storage arrangements for this chemical as per Hazcard 30.

As long as the storage guidelines has been stored correctly, this chemical is perfectly safe, but some schools are reporting the deterioration and drying out of the 2 4 DNPH over time which could produce issues. 
It is very important to ensure the 2 4-dinitrophenylhydrazine is kept damp and we would also advise not storing this or any other chemistry for a period of longer than 5 years before replenishing your stocks. This period is only a guideline as in our experience containers, labels and sometimes the chemistry itself can deteriorate in time. For further advice on this please contact your manufacturer. 
haz waste disposal


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.

Should you wish to safely dispose of your 2,4-DNP 2,4-dinitrophenylhydrazine, we can collect this for you on its own or together with any other unwanted lab waste.

Upon arrival at your school we can rehydrate the DNPH to make it safe for transport with minimum fuss and our emergency response team can usually be on site within 48 hours.

We offer a nationwide 2,4-DNP 2,4-dinitrophenylhydrazine disposal service and are fully licensed by the Environment Agency.