@Chemical: “🔵 2,4-DINITROPHENYLHYDRAZINE: USES AND RISKS 🟢 UK schools have rec…”

🔵 2,4-DINITROPHENYLHYDRAZINE: USES AND RISKS

🟢 UK schools have recently been disposing of incorrectly stored 2,4-DNPH. Here we look at what it is and the risks it can pose.

🔵 WHAT IS 2,4 DNPH USED FOR?

🟢 2,4-DNPH can be used to identity aidehydes and ketones. it is commonly used in a mixture of methanol and sulfuric acid, and reacts with aldehydes and ketones to form an orange-yellow procipitate called a 2.4- dinitrophenylhydrazone, After purification the 2,4-dinitrophenyhydrazone's melting point can help idantify the specific aldehyde or ketone that was used in the reaction.

🔵 STORING 2,4-DNPH CORRECTLY AND SAFELY

🟢 2,4-DNPH is supplled damp: it's recommended that the bottle of damp solld is stored inside a larger container with a small amount of water at the bottom. if it hasn't been stored like this, or if there is no water in the outer containet, schools have been told to assume it has dried out, and the bottle should not be opened due to the risk of a small fire or explosion: in the UK, CLEAPSS should be contacted.
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