Brilliant Blue FCF
Few natural blues exist for food, and spirulina extract is the main alternative with poorer stability.
Key Specifications
| CAS number | 3844-45-9 |
|---|---|
| E number | E133 |
| Purity | ≥ 85 percent dye content |
| Solubility | Very soluble in water |
| Dosage | 5-30 ppm |
| Stability | Good |
The standard blue in beverages
Few natural blues exist for food, and spirulina extract is the main alternative with poorer stability. That scarcity keeps Brilliant Blue in wide use for blue drinks and for greens blended with tartrazine.
Blending for green and teal
Most green shades in confectionery are Brilliant Blue plus tartrazine rather than a single green dye, which allows shade adjustment by ratio.
Typical Applications
- Blue and green beverages — 5-20 ppm, blended with a yellow for green.
- Confectionery and dairy — 5-30 ppm for blue shades in ice cream and candy.
Frequently Asked Questions
Is there a natural blue?
Spirulina extract is the main option, but it is less stable to heat and acid.
Is it approved in the EU?
Yes as E133 with maximum levels by category.
Why does my blue turn green?
Yellow colour migration or pH shift. Check adjacent components and the water source.
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