It's at the heart of the first chemical equation, and makes Hayley Birch think of quiche. This week's compound is antimony sulfide

Why do the Blue Ridged Mountains inspire so many songs? Maybe it's because of the Isoprene that gives them their blue hue...

Emilie Steinmark tells us about gluten and gluten intolerance

Simon Cotton explains the explosive history and the dangers to health of the weight-loss drug, 2,4-dinitrophenol

Brian Clegg introduces an exotic chemical dynasty: the Vanadium oxides

Simon Cotton on the compound that turns a shrinking violet into a hero: Adrenaline

Brian Clegg tells us about a silicone gel, which can sometimes be a bit silly

Raychelle Burks introduces a red dye with a prickly history.

If life hands you lemons, make lemonade – or you could make citric acid, a very useful commodity chemical according to Andrew Turley

Brian Clegg on sodium sulfate, known as 'the miraculous salt' because of its strong laxative effects.