25 October 2018
Kat Arney gets to the bottom of the story of phenolphthalein – a chemical with two very different uses. If you've measured pH in a classroom or had some trouble in the bathroom, you may have met this compound before.
8 January 2016
As consumers turn their backs on artificial food colorants, food scientists learn how to work with natural alternatives. Sarah Houlton investigates
17 July 2015
Raychelle Burks introduces a red dye with a prickly history.
26 February 2015
Regulatory bodies and researchers sceptical of study on 4-MEI found in food colour
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