Last reviewed May 2026 · 1 min read
Is Patent Blue V vegan?
Also known as: Food Blue 5, E131
E-number: E131
Vegan
Suitable for a vegan diet.
Yes — It is a synthetic triarylmethane dye produced in a lab.
01 · The basics
What is Patent Blue V?
A dark bluish-violet synthetic dye used to color foods and as a diagnostic tool in medicine.
02 · The source
Where it comes from
It is a synthetic triarylmethane dye produced in a lab. It contains no animal ingredients.
03 · Alternatives
Best vegan alternatives
Indigo Carmine (E132)
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Frequently asked
FAQ
Is E131 vegan?
Yes, it is 100% synthetic and vegan-friendly.
Where is E131 used?
It is popular in Europe for coloring sweets and drinks but is not authorized as a food additive in the US or Australia.
Commonly found in
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Other coloring ingredients
Allura Red AC
A popular synthetic red food dye used to give foods and drinks a prominent red or pink color.
Tartrazine
A bright lemon-yellow synthetic food dye commonly used in processed foods, drinks, and medications.
Brilliant Blue FCF
A synthetic blue dye used in foods, cosmetics, and dietary supplements to achieve a vibrant blue hue.
Keep exploring
Related ingredients
Allura Red AC
A popular synthetic red food dye used to give foods and drinks a prominent red or pink color.
Tartrazine
A bright lemon-yellow synthetic food dye commonly used in processed foods, drinks, and medications.
Brilliant Blue FCF
A synthetic blue dye used in foods, cosmetics, and dietary supplements to achieve a vibrant blue hue.
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