Riboflavin-5-Sodium Phosphate
A safe and beneficial nutritional colorant.
- Category
- Colours
- Vegan
- Yes
- Vegetarian
- Yes
What it is
Riboflavin-5’-sodium phosphate is the water-soluble phosphate form of vitamin B2, used as a yellow colour.
How it is used in food
Dissolves in water far better than plain riboflavin, so it colours drinks and clear gels evenly.
Commonly found in- Desserts
- Dairy products
- Sauces
- Food supplements
Health and safety
None known. The body converts it to the same vitamin B2 coenzymes it makes from riboflavin in food, and clears any excess in urine.
Handled as a nutrient rather than a hazard. In the EU list this form appears under E101(ii); the E106 number comes from older listings.
Regulatory status
| Region | Status | Notes |
|---|---|---|
| Australia & New Zealand FSANZ |
Permitted | Permitted under the FSANZ Food Standards Code. |
| European Union EFSA / European Commission |
Not approved | Not on the EU authorised list of food additives (Annex II). |
| United States FDA (Food and Drug Administration) |
Permitted | Authorised for food use by the FDA (often GRAS for standard additives). |
Identification on labels
- E-number
- E106
Worth knowing
It is why B-vitamin supplements turn urine bright yellow — the excess is simply excreted.
Conclusion
A safe and beneficial nutritional colorant.
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Open the appEntry last reviewed 2026-07-28.
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