Pigments & Colorants
REACH
Chocolate brown HT
CAS Number
4553-89-3
EC Number
224-924-0
E Number
E155
What is Chocolate brown HT?
Chocolate Brown HT (CAS 4553-89-3), also known as E155 and C.I. Food Brown 3, is a synthetic azo dye approved as a colorant in food and industrial applications.
Where is Chocolate brown HT used?
- Food manufacturing: colors biscuits, sauces and seasonings
- Textile processing: uniform brown shades on natural and synthetic fibers in batch dyeing
- Leather finishing: surface color consistency across hides and treated materials
- Printing ink formulators incorporate it into packaging inks.
Commercial specifications
- Powder or granule; particle size and solubility vary by grade
- Food-grade material meets E155 specifications under EU food additive standards
Other Names (Synonyms)
C.i. food brown 3|Disodium;4-[2-[3-(hydroxymethyl)-4,6-dioxo-5-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]cyclohex-2-en-1-ylidene]hydrazinyl]naphthalene-1-sulfonate|Brown ht|E155
What are the physical properties of Chocolate brown HT?
Melting Point >300o C
Density 0.816[at 20℃]
Color Pale Brown to Black
Form Solid
Water Solubility 99.418g/L at 25℃
Vapor Pressure 0Pa at 25℃
Log P 4.496 at 25℃