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IUPAC name : Trisodium (8Z)-7-oxo-8-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]naphthalene-1,3-disulfonate
CAS Number : 2611-82-7
EC Number : 220-036-2
ECHA InfoCard : 100.018.216
PubChem CID : 17466
ChemSpider : 11232342
E number : E124
Chemical formula : C20H11N2Na3O10S3
Molar mass : 604.46 g·mol−1
E 124 (PONCEAU 4R) is a synthetic colourant that may be used as a food colouring.
E 124 (PONCEAU 4R) is denoted by E Number E124.
E 124 (PONCEAU 4R)s chemical name is 1-(4-sulfo-1-napthylazo)-2-napthol-6,8-disulfonic acid, trisodium salt.
Ponceau (17th century French for "poppy-coloured") is the generic name for a family of azo dyes.
E 124 (PONCEAU 4R) is a strawberry red azo dye which can be used in a variety of food products, and is usually synthesized from aromatic hydrocarbons; it is stable to light, heat, and acid but fades in the presence of ascorbic acid.
E 124 (PONCEAU 4R) is used in Europe, Asia, and Australia, but has not been approved for human consumption by the United States Food and Drug Administration.
Health effects of E 124 (PONCEAU 4R)
There is no evidence of carcinogenicity, genotoxicity, neurotoxicity, or reproductive and developmental toxicity at the permitted dietary exposures; the European acceptable daily intake (ADI) is 0.7 mg/kg and the WHO/FAO ADI is 4 mg/kg.
The production process may result in unsulfonated aromatic amines present in concentrations of up to 100 mg/kg which may be linked to cancer.
The lake pigment form of the colour additive can also increase the intake of aluminium beyond the tolerable weekly intake (TWI) of 1 mg/kg/week.
Therefore, the limit for aluminium may be adjusted to accommodate for this.
Possible cause of hyperactivity of E 124 (PONCEAU 4R)
Since the 1970s and the well-publicized advocacy of Benjamin Feingold, there has been public concern that food colourings may cause ADHD-like behavior in children.
These concerns have led the FDA and other food safety authorities to regularly review the scientific literature, and led the UK FSA to commission a study by researchers at Southampton University of the effect of a mixture of six food dyes (Tartrazine, Allura Red AC, Ponceau 4R, Quinoline Yellow WS, Sunset Yellow and Carmoisine, dubbed the "Southampton 6") and sodium benzoate (a preservative) on children in the general population, who consumed them in beverages; the study published in 2007.
The study found "a possible link between the consumption of these artificial colours and a sodium benzoate preservative and increased hyperactivity" in the children;the advisory committee to the FSA that evaluated the study also determined that because of study limitations, the results could not be extrapolated to the general population, and further testing was recommended".
The European regulatory community, with a stronger emphasis on the precautionary principle, required labelling and temporarily reduced the acceptable daily intake (ADI) for the food colourings; the UK FSA called for voluntary withdrawal of the colourings by food manufacturers.
However, in 2009 the EFSA re-evaluated the data at hand and determined that "the available scientific evidence does not substantiate a link between the colour additives and behavioural effects".
There is no evidence to support broad claims that food colouring causes food intolerance and ADHD-like behaviour in children.
E 124 (PONCEAU 4R) is possible that certain food colouring may act as a trigger in those who are genetically predisposed, but the evidence is weak.
E 124 (PONCEAU 4R) consists essentially of trisodium 2-hydroxy-1-(4-sulfonato-1-naphthylazo) naphthalene-6,8-disulfonate and subsidiary colouring matters together with sodium chloride and/or sodium sulphate as the principal uncoloured components.
E 124 (PONCEAU 4R) is manufactured by coupling diazotized naphthionic acid to G acid (2-naphthol-6,8- disulphonic acid) and converting the coupling product to the trisodium salt.; Ponceau 4R is described as the sodium salt.
The calcium and the potassium salt are also permitted.
Use and Manufacturing of E 124 (PONCEAU 4R)
Used as a dye (wool, nylon, silk, inks, paper, plastics, wood stains, and leather); Used as a dye in foods, drugs, and cosmetics in countries outside the US; [HSDB]
E 124 (PONCEAU 4R) is an important textile dye that is used to dye wool a bright red directly, nylon from an acetic acid or formic acid bath and silk from an acetic acid or sulfuric acid bath.
Wool, silk and nylon are printed directly.
Other industrial uses are as a dye for inks, for dyeing paper and leather, coloring plastics and staining wood and, formerly, as a colorant for drugs and cosmetics.
Household Products of E 124 (PONCEAU 4R)
Household & Commercial/Institutional Products
Information on 14 consumer products that contain C.I. Acid Red 18 in the following categories is provided:
-Inside the Home
Methods of Manufacturing of E 124 (PONCEAU 4R)
Diazotization Of Naphthionic Acid & Coupling With 2-Naphthol-6,8-Disulfonic Acid.
Produced by coupling diazotized naphthionic acid to G acid (2-naphthol-6,8-disulfonic acid) and converting the coupling product to the trisodium salt.
General Manufacturing Information
EPA TSCA Commercial Activity Status
1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[2-(4-sulfo-1-naphthalenyl)diazenyl]-, sodium salt (1:3): ACTIVE
E 124 (PONCEAU 4R); It is a synthetic powder food coloring.
It gives red color.
Usually food coloring (Allura Red (Flag Red) E129, Brilliant Blue (Bright Blue) E133, Carmoisine (Cherry Red) E122, Chocolate Brown (Brown) E155, Dark Brown (Dark Brown) E155, Pea Green (Green) E142, Sunset It is used as Yellow (Orange) E110, Tartrazine (Yellow) E102, Titanium Dioxide (White) E171).
E 124 (PONCEAU 4R)s physical structure is powder.
E 124 (PONCEAU 4R) is soluble in water.
E 124 (PONCEAU 4R) is a synthetic red azo dye and is used as a food colorant.
E 124 (PONCEAU 4R) is used in range of alcoholic and non-alcoholic beverages, food stuffs, preserved fruits etc. It exists as trisodium-2-hydroxy-1-(4-sulfonato-1-naphthylazo)-6,8-naphthalenedisulfonate.
Application of E 124 (PONCEAU 4R)
E 124 (PONCEAU 4R) was used in the determination of contents of several additives in different non-alcoholic beverages using HPLC.
E 124 (PONCEAU 4R) was used in understanding the genotoxicity of colorants.
E 124 (PONCEAU 4R) was also used in preparing a falsified drink in the analysis of methanol-ethanol mixture using biosensors amperometric system.
Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique.
Contact Technical Service for further support.
E 124 (PONCEAU 4R) is a monoaze dye that occurs as reddish powder or granules.
E 124 (PONCEAU 4R) is principally the trisodium salt of 2-hydroxy-1-(4-sulfonato-1- naphthylazo)-6,8-naphthalenedisulfonate and subsidiary coloring matters, together with sodium chloride and/or sodium sulfate as the principal uncolored components.
E 124 (PONCEAU 4R) may be converted to the corresponding aluminum lake.
Typical applications include beverages, confectionery, bakery, dairy fats and oils, meat, seafood, snacks, dry mixes and seasonings, fruit preparation, convenient food, and pharmaceuticals.
E 124 (PONCEAU 4R) is a synthetic food coloring
E 124 (PONCEAU 4R) gives the red color to the products it is used in.
E 124 (PONCEAU 4R) is water soluble
Among the food dyes, E 124 (PONCEAU 4R) is known by the code E124.
1 pack of E 124 (PONCEAU 4R) Red food coloring contains 9 g of colorant.
E 124 (PONCEAU 4R) is used in the coloring process of desserts, canned strawberries, fruit pie fillings, jelly, salami, cheesecake, soup and seafood.
E 124 (PONCEAU 4R) is a red azo dye usually synthesized from coal tar which can be used in a variety of food products.
Since E 124 (PONCEAU 4R) is an azo dye, it may elicit intolerance in people allergic to salicylates (aspirin).
Additionally, E 124 (PONCEAU 4R) is a histamine liberator, and may intensify symptoms of asthma.
E 124 (PONCEAU 4R) is considered carcinogenic in some countries, including the USA, Norway, and Finland, and E 124 (PONCEAU 4R) is currently listed as a banned substance by the U.S. Food and Drug Administration (FDA).
Since 2000, the FDA has seized Chinese-produced haw flakes (a fruit candy) on numerous occasions for containing E 124 (PONCEAU 4R).
A study commissioned by the UK's Food Standards Agency found that when used in a mixture of other preservatives, increased levels of hyperactivity in children were observed.
E 124 (PONCEAU 4R) is a synthetic colourant that may be used as a food colouring.
E 124 (PONCEAU 4R) is a strawberry red azo dye which can be used in a variety of food products, and is usually synthesized fromaromatic hydrocarbons; E 124 (PONCEAU 4R) is stable to light, heat, and acid but fades in the presence of ascorbic acid.
E 124 (PONCEAU 4R) is a dye & It gives coloration through Solution.
For coloration E 124 (PONCEAU 4R), first pre-soluble in any suitable medium (like water, milk or any convenient medium which is compatible to final product).
This solution is then used for the coloration of final product.
E 124 (PONCEAU 4R) can be used in cosmetic products.
E 124 (PONCEAU 4R) food color is processed under the strict vigilance of our adept professionals using quality approved chemicals compounds as well progressive technology in adherence to set industry standards.
Besides, E 124 (PONCEAU 4R) food color is widely demanded in food processing industry.
E 124 (PONCEAU 4R) food color is available in different packaging options at a reasonable price.
Features: Effectiveness Safe to use Soluble in water.
E 124 (PONCEAU 4R) is a lighter red colour that is used in food production or in stage makeup and special effects.
E 124 (PONCEAU 4R) interaction with protein, Nisin and BSA was concentration dependent and may be used for protein assay.
As the dye binds with almost all the proteins and current methodology may be used for the estimation of proteins in various food systems.
During the course of present work staining with ponceau 4R of resolved proteins on PAGE (poly acryl amide gel electrophorosis) was comparable with Coommassie Brilliant Blue R250.
E 124 (PONCEAU 4R) was highly sensitive, rapid and produced sharp red bands on the gel on 0.2% concentration.
The effects of pH, concentration of proteins and dye were also investigated in various conditions which would help food processors to use a calculated amount of dye.
The impact of tryptic digestibility on Ponceaue 4R -Protein Complexes (PPC) has illustrated that dye may safely be used without any adverse effect on the digestion of PPC.
E 124 (PONCEAU 4R) (E124 food additive), is a colorant of synthetic origin, which has a crimson color.
E 124 (PONCEAU 4R) colorant opens the whole palette of tints: when yellow (E102, E104) or orange (E110) colorants are added, the brown color is obtained, and when it is mixed with a blue E 124 (PONCEAU 4R) colorant gives purple color.
By its chemical composition E124 colorant is sodium salt: granulate or powder of red color perfectly soluble in water.
The chemical formula of the E124 colorant: C20H11N2Na3O10S3.
The E124 additive is thermostable, resistant to the effects of light, reducing agents and oxidants Products processed by Ponceau 4R can be subjected to any technological operations (sterilization, pasteurization, cooling, freezing, etc.).
In the United States, Finland, Norway and some other countries, E124 (Ponceau 4R) is included in the list of banned substances as a carcinogen which can provoke cancer.
Besides, the E124 additive is a strong allergen which can cause anaphylactic shock or asphyxiation attack in asthmatics and people with aspirin intolerance.
The E124 food additive is included in the list of food colorings that increase children’s hyperactivity.
Due to its synthetic origin, the E124 additive is not characteristic of living organisms.
There is no scientific evidence of any benefits of the Ponceau 4R colorant at the moment.
Use of E 124 (PONCEAU 4R)
E 124 (PONCEAU 4R) (E124 additive) is widely used (alone or in combination with other colorants) in the coloring of products in the confectionery industry, beverage production, ice cream, pudding, desserts and canned fruits.
The E124 additive is used in the production of fish and meat products, dairy desserts, cakes and curd products.
Other uses of the E 124 (PONCEAU 4R) colorant:
-In the production of liquid detergents (shampoos, liquid soap, bath foam and shower).
-In the textile industry, used as a colorant for wool and silk.
-In cosmetology for coloring products.
E 124 (PONCEAU 4R) is always open to evaluation in the food industry.
E 124 (PONCEAU 4R) has a structure that can be evaluated on many foods such as ice creams, candies, jellies, chewing gums, etc.
that people can consume.
In this context, apart from food, all details such as cosmetics, pharmaceuticals and play dough are evaluated and included in production.
E 124 (PONCEAU 4R) may cause a reaction in individuals with salicylate allergies.
The dye has been mildly associated with hyperactivity in children.
A 2001 review of safety data on the dye, by the European Food Safety Authority, concluded that Ponceau 4R did not pose a risk at current consumption levels.
E 124 (PONCEAU 4R) is a synthetic colourant that may be used as a food colouring and is a strawberry red azo dye which can be used in a variety of food products.
E 124 (PONCEAU 4R) is stable to light, heat, and acid but fades in the presence of ascorbic acid.
E 124 (PONCEAU 4R) is usually synthesized fromaromatic hydrocarbons.
First Aid Measures of E 124 (PONCEAU 4R)
Eye Contact:
- Wash eyes with plenty of water for at least 15 minute
- Seek medical attention if irritation persists
Skin Contact
-Wash off with plenty of water & soap
Ingestion
-plenty full water to be taken inside, special medical attention may not be necessary.
Inhalation
-Seek medical attention if excessive.
Substance identity
EC / List no.: 220-036-2
CAS no.: 2611-82-7
Hazard classification & labelling of E 124 (PONCEAU 4R)
According to the notifications provided by companies to ECHA in REACH registrations no hazards have been classified.
About E 124 (PONCEAU 4R)
E 124 (PONCEAU 4R) is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 100 to < 1 000 tonnes per annum.
E 124 (PONCEAU 4R) is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
Consumer Uses of E 124 (PONCEAU 4R)
E 124 (PONCEAU 4R) is used in the following products: inks and toners, cosmetics and personal care products, plant protection products, fertilisers, washing & cleaning products, paper chemicals and dyes, textile treatment products and dyes, biocides (e.g. disinfectants, pest control products) and water treatment chemicals.
Other release to the environment of E 124 (PONCEAU 4R) is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.
Article service life of E 124 (PONCEAU 4R)
Release to the environment of E 124 (PONCEAU 4R) can occur from industrial use: industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal).
Other release to the environment of E 124 (PONCEAU 4R) is likely to occur from: indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment) and outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials).
E 124 (PONCEAU 4R) can be found in products with material based on: paper (e.g. tissues, feminine hygiene products, nappies, books, magazines, wallpaper), fabrics, textiles and apparel (e.g. clothing, mattress, curtains or carpets, textile toys), leather (e.g. gloves, shoes, purses, furniture) and stone, plaster, cement, glass or ceramic (e.g. dishes, pots/pans, food storage containers, construction and isolation material).
Widespread uses by professional workers of E 124 (PONCEAU 4R)
E 124 (PONCEAU 4R) is used in the following products: textile treatment products and dyes, inks and toners, paper chemicals and dyes, cosmetics and personal care products, plant protection products, fertilisers, washing & cleaning products, leather treatment products, biocides (e.g. disinfectants, pest control products), non-metal-surface treatment products and water treatment chemicals.
E 124 (PONCEAU 4R) is used in the following areas: agriculture, forestry and fishing, printing and recorded media reproduction and building & construction work.
E 124 (PONCEAU 4R) is used for the manufacture of: textile, leather or fur, wood and wood products, pulp, paper and paper products and food products.
Other release to the environment of this substance is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.
Formulation or re-packing of E 124 (PONCEAU 4R)
E 124 (PONCEAU 4R) is used in the following products: inks and toners, leather treatment products and paper chemicals and dyes.
Release to the environment of E 124 (PONCEAU 4R) can occur from industrial use: formulation of mixtures and formulation in materials.
Uses at industrial sites of E 124 (PONCEAU 4R)
E 124 (PONCEAU 4R) is used in the following products: paper chemicals and dyes, textile treatment products and dyes, leather treatment products, inks and toners and polymers.
E 124 (PONCEAU 4R) is used in the following areas: printing and recorded media reproduction.
E 124 (PONCEAU 4R) is used for the manufacture of: textile, leather or fur, pulp, paper and paper products, wood and wood products and plastic products.
Release to the environment of E 124 (PONCEAU 4R) can occur from industrial use: in the production of articles and in processing aids at industrial sites.
Manufacture of E 124 (PONCEAU 4R)
Release to the environment of E 124 (PONCEAU 4R) can occur from industrial use: manufacturing of the substance.
Synonyms:
Ponceau 4R
New coccine
2611-82-7
Acid red 18
C.I. Acid Red 18
SX Purple
Food Red No. 102
Victoria Scarlet 3R
Cochineal Red A
Food Red 102
C.I. Acid Red 28
Coccine
Neucoccin
Brilliant Scarlet 3R
Strawberry Red
Coccin Red
New Coccin
Purple Red
Brilliant Scarlet
Atul Scarlet F
Acid Ponceau 4R
Acid Scarlet 3R
Acid Scarlet 4R
Java Scarlet 3R
Neklacid Red 3R
Neklacid Red 4R
Scarlet 4R
Ponceau 4RE
Ponceau 4RF
Ponceau 4RT
Scarlet 4RA
Cochineal Red 4R
Kiton Scarlet 4R
Acid Scarlet 3RZ
Acid Brilliant Scarlet 3R
Cilefa Ponceau 4R
Fenazo Scarlet 3R
HD Ponceau 4R
Ponceau 4RE.FQ
Colacid Ponceau 4R
Food Red 7
Hexacol Ponceau 4R
Pontacyl Scarlet RR
Acilan Scarlet V3R
UNII-Z525CBK9PG
Victoria Scarlet Red
Brilliant Ponceau 3R
Brilliant Ponceau 4R
Brilliant Ponceau 5R
Brilliant Scarlet 4R
Certicol Ponceau 4RS
C.I. Acid Red 18, Trisodium Salt
Curol Bright Red 4R
Atul Acid Scarlet 3R
Brilliant Ponceau 3RF
Brilliant Ponceau 4RC
HD Ponceau 4R Supra
Naphthalene Scarlet 4R
C.I. Food Red 7
Strawberry Red A Geigy
Naphthalene Scarlet 4RS
L-Red 4
Edicol Supra Ponceau 4R
Eurocert Cochineal Red A
Hidacid Fast Scarlet 3R
Acidal Bright Ponceau 3R
Kochineal Red A for Food
New Coccine Extra Pure A
Edicol Supra Ponceaux 4RS
C.I. 16255
Naphthalene Ink Scarlet 4R
Sugai Brilliant Scarlet 3R
Edicol Supra Ponceaux 4 RS
Rakuto Brilliant Scarlet 3R
Aizen Brilliant Scarlet 3RH
San-ei Brilliant Scarlet 3R
Bucacid Brilliant Scarlet 3R
Takaoka Brilliant Scarlet 3R
1578 Red
Daishiki Brilliant Scarlet 3R
Acid Red 18;New Coccine
Calcocid Brilliant Scarlet 3RN
Cochineal Red A Specially Pure
Hispacid Brilliant Scarlet 3RF
Z525CBK9PG
Kayaku Acid Brilliant Scarlet 3R
Kayaku Food Colour Red No. 102
New Coccine Extra Conc. A Export
Symulon Acid Brilliant Scarlet 3R
1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((4-sulfo-1-naphthalenyl)azo)-, trisodium salt
E 124
Brilliant Ponceau 4RC Specially Pure
Brilliant Scarlet 3R (Biological stain)
MFCD00004084
Zolfosol
Crimson SX
Purple SX
Neucoccin [German]
L-Rot 4 [German]
Food Red Number 102
Cochenillerot A
Coccine nouvelle
Red Dye No. 102
Cochenillerot A [German]
Coccine nouvelle [French]
Edicol Supra Ponceau 4RS
Trisodium 7-hydroxy-8-(4-sulfonatonaphthalen-1-yl)diazenylnaphthalene-1,3-disulfonate
Cerven kysela 18 [Czech]
Cerven kosenilova A [Czech]
Cerven kysela 18
1082572-30-2
New Coccine Red No. 102
Cerven kosenilova A
Schultz Nr. 213 [German]
CCRIS 2652
Cerven potravinarska 7 [Czech]
Rouge de cochenille A [French]
Rouge de cochenille A
Schultz Nr. 213
C.I. Acid Red 18 (VAN)
Cerven potravinarska 7
HSDB 5537
L-Rot 4
NSC 4301
EINECS 220-036-2
Victoria Scharlach 4 R Extra [German]
C.I. 185
CI 16255
Victoria Scharlach 4 R Extra
Sodium 7-hydroxy-8-((4-sulfonatonaphthalen-1-yl)diazenyl)naphthalene-1,3-disulfonate
trisodium 7-hydroxy-8-[(Z)-(4-sulfonato-1-naphthyl)diazenyl]-1,3-naphthalenedisulfonate
trisodium;7-hydroxy-8-[(E)-(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1,3-disulfonate
Scarlet 3R
Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate
Ponceau 4 R
51811-48-4
Food red No.102
Acid Red 18,
1-(4-Sulpho-1-naphthylazo)-2-naphthol-6,8-disulphonic acid, trisodium salt
EC 220-036-2
Ponceau 4RC (E124)
7-Hydroxy-8-((4-sulfo-1-naphthalenyl)azo)-1,3-naphthalenedisulfonic acid trisodium salt
DTXSID9021213
Ponceau 4R, analytical standard
New Coccine, Dye content 75 %
C20H11N2O10S3.3Na
Ponceau 4R (C.I. 16255)
AKOS000282867
AKOS015903123
AKOS024319577
7-Hydroxy-8-((4-sulfo-1-naphthalenyl)azo)-1,3-naphthalenedisulfon- ic acid, trisodium salt
trisodium 7-hydroxy-8-[(Z)-(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1,3-disulfonate
trisodium;7-hydroxy-8-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1,3-disulfonate
F0140
N0309
C20344
D91673
Q384709
J-016263
Ponceau 4RC (E124) 100 microg/mL in Acetonitrile:Water
sodium (E)-7-hydroxy-8-((4-sulfonatonaphthalen-1-yl)diazenyl)naphthalene-1,3-disulfonate
1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-(2-(4-sulfo-1-naphthalenyl)diazenyl)-, sodium salt (1:3)
C.I. Acid Red 18
CI 16255
Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate
Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate
trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate
1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[2-(4-sulfo-1-naphthalenyl)diazenyl]-, sodium salt (1:3)
1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((4-sulfo-1-naphthalenyl)azo)-, trisodium salt
Registration dossier
1,3-naphthalenedisulfonic acid, 7-hydroxy-8-((4-sulfo-1-naphthalenyl)azo)-, trisodium salt
Acid Red 18
C.I. Acid Red 18
Everacid SA20
Food Red 7E124
Ponceau 4R E124 (Acid Red 18)
trisodium (8Z)-7-oxo-8-((4-sulfonatonaphthalen-1-yl)hydrazinylidene) naphthalene-1,3-disulfonate
trisodium (8Z)-7-oxo-8-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]naphthalene-1,3-disulfonate
trisodium (8Z)-7-oxo-8-[2-(4-sulfonatonaphthalen-1-yl)hydrazin-1- ylidene]-7,8-dihydronaphthalene-1,3-disulfonate
trisodium (8Z)-7-oxo-8-[2-(4-sulfonatonaphthalen-1-yl)hydrazin-1-ylidene]-7,8-dihydronaphthalene-1,3-disulfonate
Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate
trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate
trisodium 7-hydroxy-8-[(4-sulfonato-1-naphthyl)diazenyl]naphthalene-1,3-disulfonate
trisodium 7-hydroxy-8-[(E)-2-(4-sulfonaphthalen-1-yl)diazen-1-yl]naphthalene-1,3-disulfonate
trisodium 7-oxo-8-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]naphthalene-1,3-disulfonate
Acid Red 18
Everacid SA20
Neelicol Ponceau 4R
Neelink Red PR
11138-24-2
11138-24-2
12000-58-7
12000-58-7
161628-34-8
161628-34-8
247151-36-6
247151-36-6
2611-82-7
2783-94-0
39470-82-1
39470-82-1
39471-00-6
39471-00-6
51811-48-4
51811-48-4
