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Ponceau 6R, or Crystal ponceau 6R, Crystal scarlet, Brilliant crystal scarlet 6R, Acid Red 44, or C.I. 16250,[1][2] is a red azo dye.
Ponceau 6R is soluble in water[2] and slightly soluble in ethanol.
Ponceau 6R was used as a food dye, formerly having E number E126.
CAS: 2766-77-0
MF: C20H12N2Na2O7S2
MW: 502.43
EINECS: 220-441-4
Synonyms
CRYSTAL SCARLET;CRYSTAL PONCEAU;CRYSTAL PONCEAU 6R;CI 16250;CI NO 16250;BRILLIANT CRYSTAL SCARLET;crystalscarlet(acidred44);PONCEAU 6R
Ponceau 6R is also used in histology, for staining fibrin with the MSB Trichrome stain.
Ponceau 6R usually comes as disodium salt.
Amaranth is a closely related azo dye, also usable in trichrome staining.
An organic sodium salt that is the disodium salt of 7-hydroxy-8-[(naphthalen-1-yl)diazenyl]naphthalene-1,3-disulfonic acid.
Ponceau 6R, also known as E126, is a synthetic food colorant that gives products a red color.
Ponceau 6R is often used in the food industry to improve the visual appeal of various food products, but its use is currently regulated due to some health controversies.
As an azobar dye, Ponceau 6R has raised some concerns about the possibility of allergic reactions in some people, which has led to restrictions on its use in some countries.
Ponceau 6R, also known by its CAS number 2766-77-0, is a synthetic azo dye primarily used in the textile and food industries for coloring purposes.
Ponceau 6R exhibits a vibrant red hue and is soluble in water, making it suitable for various applications, including dyeing and printing fabrics, as well as in food and cosmetic products.
The dye is characterized by its stability under acidic conditions, though it may be less stable in alkaline environments.
Ponceau 6R is known for its good lightfastness and washfastness properties, which contribute to its effectiveness in maintaining color intensity during use.
However, like many azo dyes, Ponceau 6R has raised environmental and health concerns due to potential toxicity and the ability to release aromatic amines upon degradation.
Regulatory agencies often monitor its use, and it is essential to adhere to safety guidelines when handling this substance.
Overall, Ponceau 6R is a widely utilized dye with specific characteristics that make it valuable in various industrial applications.
Ponceau 6R Chemical Properties
Melting point: >300 °C(lit.)
storage temp.: Amber Vial, Refrigerator, Under inert atmosphere
solubility: DMSO (Slightly), Methanol (Slightly)
form: Powder
Colour Index: 16250
color: Red
Water Solubility water: soluble 10mg/mL, dark red
Stability: Light Sensitive
Major Application: cleaning products
cosmetics
food and beverages
personal care
InChIKey: FUGCXLNGEHFIOA-ZPZFBZIMSA-L
Soluble in water for red, soluble in ethanol for yellow light red, almost insoluble in acetone.
The strong sulfuric acid for red light blue, diluted for scarlet.
In water solution to join hydrochloric acid colour and lustre is darker, and extra a flake crystallization precipitation part; Add thick sodium hydroxide solution for yellow brown.
Ponceau 6R is water-soluble and stable under various food processing conditions.
Ponceau 6R is resistant to light and temperature, making it a relatively durable food colorant.
Uses
Ponceau 6R can be used as analyte in analytical study for determination of 36 artificial pigments in foods by ultra high performance liquid chromatography and time-of-fight mass spectrometry.
The dye is mainly used in food products such as sodas, jams, fruit preserves, as well as in cosmetics.
Its main role is to impart an intense red color to products.
Ponceau 6R has been used in the MSB (martius yellow–crystal scarlet–methyl blue) staining procedure for the staining of collagen fibers and erythrocytes.
Preparation
Naphthalen-1-amine diazo, and 7-Hydroxynaphthalene-1,3-disulfonic acid coupling.
Biological Activity
Ponceau 6R is mainly used in the MSB (martius yellow–crystal scarlet–methyl blue) staining procedure for the staining of connective tissue and fibrin.
