Patent Blue V
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A dark bluish-violet synthetic coal tar dye.

Not widely used but can be found in Scotch eggs and is used diagnostically to colour lymph vessels.

Best avoided by people with allergy reactions as it can cause skin sensitivity, a rash similar to nettle rash, itching, nausea, low blood pressure, tremors and breathing problems.

Not recommended for consumption by children.

Banned in Australia, USA and Norway.