Patent Blue V (E131) — What You Need to Know
What Is Patent Blue V?
Patent Blue V is a synthetic triarylmethane dye used primarily in the EU as a blue food coloring. It is also used in medical applications as a surgical dye for sentinel lymph node detection during breast cancer and melanoma surgery.
What Is It Used For?
Produces blue and blue-green shades in confectionery, beverages, and processed foods. Also used as a diagnostic dye in surgical procedures.
Safety Assessment
Can cause allergic reactions including urticaria and anaphylaxis in rare cases. Used as a surgical dye for sentinel lymph node detection, where anaphylactic reactions have been documented (incidence ~1 in 2,000). Not approved for food use in the US, Australia, or Norway. EFSA re-evaluated in 2013 and maintained ADI.
Based on current evidence, Patent Blue V is rated Caution with a score of 5/10. This is 0.8 points below the average for colorings (5.8/10). Last reviewed by regulators: 2013. A typical diet provides about 0% of the acceptable daily intake.
Commonly Found In
Always check the label for E131 or 'Patent Blue V'
▶Chemical Information
Frequently Asked Questions about Patent Blue V
Quick Facts
- E-Number
- E131
- INS Number
- 131
- Category
- Colorings
- Origin
- Synthetic
- FDA Status
- Not approved in US
- EFSA Status
- Approved in EU with ADI of 5 mg/kg bw/day (re-evaluated 2013)
- ADI
- 5 mg/kg bw/day
- Last Review
- 2013
Related Additives
Other colorings in the same family