Brown HT
{{chembox
| ImageFile = Brown HT structure.png
| ImageSize = 260px
| ImageAlt = Skeletal formula of Brown HT
| ImageFile1 = Brown HT ions spacefill.png
| ImageSize1 = 230px
| ImageAlt1 = Space-filling models of the ions in Brown HT
| IUPACName = Disodium 4-[(2E)-2-[(5Z)-3-(hydroxymethyl)-2,6-dioxo-5-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]-1-cyclohex-3-enylidene]hydrazinyl]naphthalene-1-sulfonate
| OtherNames = {{Unbulleted list
| Chocolate Brown HT
| Food Brown 3
| C.I. 20285, E155
}}
|Section1={{Chembox Identifiers
| ChemSpiderID = 21172062
| 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
| InChIKey = BIRIBMFCDVVRKL-NUQVWONBAS
| CASNo = 4553-89-3
| CASNo_Ref = {{cascite|correct|CAS}}
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 067L3J47ID
| PubChem = 6536776
| ChEMBL = 1697823
| SMILES = [Na+].[Na+].Oc3c(cc(CO)c(O)c3N=Nc2ccc(c1ccccc12)S([O-])(=O)=O)N=Nc5ccc(c4ccccc45)S([O-])(=O)=O
}}
|Section2={{Chembox Properties
| Formula = C27H18N4Na2O9S2
| MolarMass = 652.56 g/mol
| Appearance =
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|Section3={{Chembox Hazards
| MainHazards =
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}}
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.{{cite web|url=https://healthknight.com/brown-ht-e155-side-effects-benefits |title=Brown HT (E155) – Overview, Uses, Side Effects & More |date=10 May 2022 |publisher=HealthKnight |access-date=2022-05-21}}[http://www.fao.org/docrep/meeting/005/y0474s/y0474s1t.htm Brown HT], Report of the 33rd Session of the Codex Committee on Food Additives.
It is approved for use by the European Union.{{cite web | url = https://www.food.gov.uk/business-guidance/eu-approved-additives-and-e-numbers | title = EU Approved additives and E Numbers | publisher = UK Food Standards Agency}} It is banned in Australia, Austria, Belgium, Denmark, France, Germany, Norway, Sweden, Switzerland, Russia and the United States.{{usurped|1=[https://web.archive.org/web/20210323123158/http://www.ukfoodguide.net/e155.htm E155]}}, UK Food Guide.