I found this. I noted insomnia ,heatwaves/ hot flushes? ,depression - even in minute doses. Enough to make one a little cautious.
Tartrazine is a synthetic yellow azo dye derived from coal tar and has been banned in several countries (Austria, Norway) because of serious side effects such as causing potentially lethal asthma attacks and nettle rash, hives, DNA damage, tumors of the thyroid and ADHD.
Other dangers of Tartrazine are anxiety attacks, itching, rhinitis, urticaria, general weakness, heatwaves, migraine, clinical depression, blurred vision, palpitations, feeling of suffocation, pruritus, purple skin patches and sleep disturbance. In rare cases, Tartrazine side effects are noticeable even at minute doses and can last up to 72 hours after exposure.