Tetrabromofluorescein
CAS 15086-94-9
EC 239-138-3
Formula C20H8Br4O5
MW 647.89 g/mol
Pigments & Colorants Personal Care & CosmeticsTextile, Leather & PaperPrinting & PackagingPlastics & Polymers Flame RetardancySurface Modification & WettingAntioxidant & Stabilizer
Description
Tetrabromofluorescein (CAS 15086-94-9) is a brominated xanthene dye commercially known as Red 21, Eosin B, and AKA223. It carries no assigned E-code and is classified under HS code 32041919. The compound is recognised under EC number 239-138-3 and belongs to the halogenated fluorescein family of synthetic colorants.
In personal care formulations, it functions as a colour-change pigment that shifts tone upon contact with skin pH, making it a standard ingredient in long-wear lip products. In plastics and polymer compounding, its bromine content contributes flame retardancy by interrupting radical chain reactions during combustion. It also sees use as a dye in textile and leather processing.
This material is supplied as an orange-brown powder and is available in technical and cosmetic-grade specifications. Procurement should verify REACH registration status and confirm compliance with EU cosmetics regulation where applicable. Standard packaging formats include fibre drums and multi-layer bags for bulk orders.
In personal care formulations, it functions as a colour-change pigment that shifts tone upon contact with skin pH, making it a standard ingredient in long-wear lip products. In plastics and polymer compounding, its bromine content contributes flame retardancy by interrupting radical chain reactions during combustion. It also sees use as a dye in textile and leather processing.
This material is supplied as an orange-brown powder and is available in technical and cosmetic-grade specifications. Procurement should verify REACH registration status and confirm compliance with EU cosmetics regulation where applicable. Standard packaging formats include fibre drums and multi-layer bags for bulk orders.
Physical Properties
| Melting Point | 300 °C |
| Boiling Point | 640.3±55.0 °C(Predicted) |
| Density | 1.02 g/mL at 20 °C |
| Appearance | orange-brown powder |
| Color | White to Light yellow to Red |
| Form | Liquid |
| Refractive Index | 1.5000 (estimate) |
Safety & Handling (Learn More)
Warning GHS07
H
H302
P
P264P270P330P501P301+P317
Trade & Regulatory
| HS Code | 32041919 |
| UN Number | 1170 |
| ADR Class | 3 |
| Packing Group | II |
| WGK (Germany) | 3 |
Other Names
Eosin Y2',4',5',7'-TetrabromofluoresceinD & C Red no. 212',4',5',7'- tetrabromofluoresceinRED 21AKA223EOSINE
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