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
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).

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 can also be found in desserts, cookies, candy, cheeses, teas, yogurts, jams, chocolate drinks, ice creams, fruit products, fish, wafers, breakfast cereals, and other products.[1][2]

It is approved for use by the European Union.[3] It is banned in Australia, Austria, Belgium, Denmark, France, Germany, Norway, Sweden, Switzerland, Russia and the United States.[4]


  1. ^ "Brown HT (E155) – Overview, Uses, Side Effects & More". HealthKnight. 10 May 2022. Retrieved 2022-05-21.
  2. ^ Brown HT, Report of the 33rd Session of the Codex Committee on Food Additives.
  3. ^ "EU Approved additives and E Numbers". UK Food Standards Agency.
  4. ^ E155 Archived 2021-03-23 at the Wayback Machine, UK Food Guide.