Brown HT

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Brown HT
Skeletal formula of Brown HT
Space-filling models of the ions in Brown HT
IUPAC name
Disodium 4-[(2E)-2-[(5Z)-3-(hydroxymethyl)-2,6-dioxo-5-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]-1-cyclohex-3-enylidene]hydrazinyl]naphthalene-1-sulfonate
Other names
Chocolate Brown HT, Food Brown 3, C.I. 20285, E155
  • 4553-89-3 checkY
3D model (JSmol)
ECHA InfoCard 100.022.659 Edit this at Wikidata
E number E155 (colours)
  • InChI=1/C27H20N4O9S2.2Na/c32-14-15-13-22(30-28-20-9-11-23(41(35,36)37)18-7-3-1-5-16(18)20)27(34)25(26(15)33)31-29-21-10-12-24(42(38,39)40)19-8-4-2-6-17(19)21;;/h1-13,32-34H,14H2,(H,35,36,37)(H,38,39,40);;/q;2*+1/p-2
  • [Na+].[Na+].Oc3c(cc(CO)c(O)c3N=Nc2ccc(c1ccccc12)S([O-])(=O)=O)N=Nc5ccc(c4ccccc45)S([O-])(=O)=O
Molar mass 652.56 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Brown HT, also called Chocolate Brown HT, Food Brown 3, and C.I. 20285, is a brown synthetic coal tar diazo dye.

When used as a food dye, its E number is E155. It is used to substitute cocoa or caramel as a colorant. It is used mainly in chocolate cakes, but also in milk and cheeses, yogurts, jams, fruit products, fish, and other products.[1]

It is approved for use by the European Union.[2] It is banned in Australia, Austria, Belgium, Denmark, France, Germany, Norway, Sweden, Switzerland, and the United States.[3]


  1. ^ Brown HT, Report of the 33rd Session of the Codex Committee on Food Additives
  2. ^ "EU Approved additives and E Numbers". UK Food Standards Agency.
  3. ^ E155, UK Food Guide