Quick Search
Ponceau SX is a red azo dye once used as a food dye.
As a food additive, Ponceau SX has the E number E125.
Ponceau SX is usually used as a disodium salt.
CAS: 4548-53-2
MF: C18H17N2NaO7S2
MW: 460.45
EINECS: 224-909-9
Synonyms
PONCEAU SX;12101red;disodium 3-[(2,4-dimethyl-5-sulphonatophenyl)azo]-4-hydroxynaphthalene-1-sulphonate;AKA504;CI 14700;D AND C RED NO 4;FOOD RED 1;1-Naphthalenesulfonic acid, 3-(2,4-dimethyl-5-sulfophenyl)azo-4-hydroxy-, disodium salt
In the United States, Ponceau SX is not permitted for use in food or ingested drugs and may only be used in externally applied drugs and cosmetics, due to potential carcinogenic effects from ingesting it.
An exception was added in 1965 to allow its use in the coloring of maraschino cherries, which were considered mainly decorative and not a foodstuff.
This exception was repealed and the dye banned in the US on September 22, 1976 due to mounting safety concerns.
In the European Union, Ponceau SX is not permitted as a food additive.
Ponceau SX is classed chemically as a monoazo colour.
Ponceau SX Chemical Properties
Melting point: >300℃
density: 0.272[at 20℃]
solubility: Soluble in water, ethanol
Colour Index: 14700
form: crystals
color: Red
Water Solubility: 130.4g/L at 30℃
λmax: 500 nm
Merck: 14,7591
BRN: 7161700
Biological Applications Detecting proteins; treating acquired resistance to GABAergic (ARG) agents; Shampoos; soaps
Major Application: cleaning products
cosmetics
food and beverages
personal care
Cosmetics Ingredients Functions COLORANT
HAIR DYEING
InChIKey: ONTQJDKFANPPKK-LLIZZRELSA-L
LogP: -0.083
CAS DataBase Reference: 4548-53-2(CAS DataBase Reference)
IARC: 3 (Vol. 8, Sup 7) 1987
EPA Substance Registry System: Ponceau SX (4548-53-2)
Soluble in water for yellow light red, slightly soluble in alcohol.
The strong sulfuric acid is a deep in the red, red after diluted precipitation; In nitric acid solution for orange, then become yellow.
The dye solution to join strong hydrochloric acid red slightly deepen; Add thick sodium hydroxide solution for orange.
Uses
Dye in externally applied drugs, cosmetics; food colorant in maraschino cherries.
Preparation
2,4-Dimethyl-5-aminobenzenesulfonic acid diazo, coupled with the 4-Hydroxynaphthalene-1-sulfonic acid.
Reactivity Profile
Ponceau SX is an azo compound.
Azo, diazo, azido compounds can detonate.
This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids.
Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents.
Flammable gases are formed by mixing materials in this group with alkali metals.
Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
