Bloxham School safety explosion – Nov 2016

The national press recently carried articles about a substance, 2,4-dinitrophenylhydrazine (or 2,4-DNPH) which has been used in chemical tests since 1894 and will be found in very many chemical laboratories including many schools that teach A-level chemistry.

The reagent is normally supplied in moist form as it can become unstable if allowed to totally dry out. Recently CLEAPSS, an advisory service providing support in science and technology for schools, reminded schools of the correct procedures for storing 2,4-dinitrophenylhydrazine. Some schools subsequently summoned the bomb squad to dispose of stocks using a controlled explosion where there was any doubt as to whether it had been stored correctly.

Bloxham School decided upon a “better safe than sorry” approach as set out in the letter from them below.

Dear neighbour,
You may have seen reports in the news this week about controlled detonations taking place at a number of schools around the country to make safe a chemical called 2,4-DNP, used in Chemistry A Level lessons. We also have this chemical at school, and indeed have done without incident for some 30 years. Following recent advice from Cleapss (the advisory body), we contacted the police on Friday and a controlled detonation was carried out on the substance. We always store our chemicals safely and follow the advice of the experts and manufacturers. Last night’s action was purely precautionary. Apart from a loud bang, it passed off without issue and we hope it did not cause concern to Bloxham villagers.
Kind regards,
Bloxham School