Sudan IV, a diazo dye widely used to stain fuel and industrial grease, is a carcinogen and therefore unsuitable for human consumption. In a recent case in Ghana, it was added to palm oil to achieve the typical reddish-brown color. Adulteration of palm oil is a recurring issue that has been taking place across Asian and African brands, including products sold in Europe, and authorities keep warning of the consumption of the tarnished palm oil.
- Times of Malta (June 28, 2019). “Palm oil contains dangerous dye, authorities warn”.
- FDA food alert, April 2018, Palm oil recall due to the presence of Sudan IV
- Swiss government warns of cancerous palm oil, January 2018. Palm Oil adulteration with Sudan IV. Origin of the oil is unknown but most likely an African producer
- CFA Alert, August 2017, Food recall: Palm oil adulterated with Sudan IV