![2,4-DNPH and controlled explosions](https://i0.wp.com/www.compoundchem.com/wp-content/uploads/2016/11/24-DNPH.png?resize=700%2C495&ssl=1)
In the UK, school chemistry departments found themselves unexpectedly hitting the headlines last week due to a chemical used in A level chemistry practicals. The chemical involved was 2,4-dinitrophenylhydrazine (2,4-DNPH) – so what is it and why the sudden spate of concern? This post and graphic takes a look at the chemical facts behind the stories.