2611-82-7

Basic information

• Product Name: Acid Red 18
• Synonyms: SCARLET 3R;SCARLET 3R, WATER SOLUBLE;NEW COCCINE;PONCEAU 4R;PONCEAU 4RC;trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate;1-(4-Sulfo-1-naphthylazo)-2-hydroxy-6,8-naphthalenedisulfonicacidtrisodiumsalt;1-(4-sulpho-1-naphthylazo)-2-naphthol-6,8-disulphonicacid,trisodiumsalt
• CAS NO: 2611-82-7
• Molecular Formula: C₂₀H₁₁N₂O₁₀S₃*3Na
• Molecular Weight: 604.47
• EINECS: 220-036-2
• Product Categories: Organics;Analytical Chemistry;Food Colors by Food Sanitation Law in Japan;pigment
• Mol File: 2611-82-7.mol
• Article Data: 0

Chemical Properties

• Appearance: Bordeaux to brown/Powder
• Density: 1.772[at 20℃]
• Vapor Pressure: 0Pa at 25℃
• Storage Temp.: Inert atmosphere,Room Temperature
• Solubility: DMSO (Slightly, Heated, Sonicated), Methanol (Slightly, Heated), Water (Slightly
• Water Solubility: 305.21g/L at 20℃
• Stability: Hygroscopic
• BRN: 4122340
• CAS DataBase Reference: Acid Red 18(CAS DataBase Reference)
• NIST Chemistry Reference: Acid Red 18(2611-82-7)
• EPA Substance Registry System: Acid Red 18(2611-82-7)

Safety Data

• Safety Statements: 22-24/25
• WGK Germany: 2
• RTECS: QJ6530000
• Hazardous Substances Data: 2611-82-7(Hazardous Substances Data)

Usage

Uses

Different sources of media describe the Uses of 2611-82-7 differently. You can refer to the following data:
1. Food Red No. 102 is an artificial coloring food additive. Dye.
2. Food Red No. 102 is an artificial coloring food additive. Dye. Dyes and metabolites, Environmental Testing

Preparation

4-Aminonaphthalene-1-sulfonic acid diazo, and 7-Hydroxynaphthalene-1,3-disulfonic acid coupling.

Flammability and Explosibility

Nonflammable

Safety Profile

Moderately toxic by intraperitoneal route. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx and SOx.

Properties and Applications

red. Red powder. Soluble in water red, slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. Strong sulfuric acid in purple, will the red orange is diluted; Nitric acid solution in yellow. Its water solution and strong hydrochloric acid red, add sodium hydroxide is brown. Mainly used for wool, silk, polyamide fiber and its blended fabric dyeing, also can be used for leather, paper, plastic, wood, medicine and cosmetics of dyeing, still can make the ink. Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater Fading Stain Fading Stain Fading Stain ISO 4 2 3-4 2 1-2 3 AATCC 4 2 2 1 1 4

Standard

Light Fastness

Fading

Stain

ISO

4

AATCC

4

Purification Methods

Dissolve the dye in the minimum quantity of boiling water, filter and enough EtOH is added to precipitate ca 80% of the dye. This process is repeated until a solution of the dye in aqueous 20% pyridine has a constant extinction coefficient. [Beilstein 16 I 306.]

InChI:InChI=1/C20H14N2O10S3.3Na/c23-16-7-5-11-9-12(33(24,25)26)10-18(35(30,31)32)19(11)20(16)22-21-15-6-8-17(34(27,28)29)14-4-2-1-3-13(14)15;;;/h1-10,21H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;;/q;3*+1/p-3/b22-20+;;;

Synthetic route

3,5-bis((4-chloro-6-(hexylamino)-1,3,5-triazine-2-yl)amino)-2,4,6-trimethylbenzenesulfonic acid sodium salt + ponceau 4R (2611-82-7) → C67H60N14O23S7(6-)*6Na(1+)

Conditions	Yield
With sodium hydrogencarbonate In benzene at 85℃; for 24h;	80.6%

C84H84N20O8S4 + ponceau 4R (2611-82-7) → C84H84N20O8S4*C20H11N2O10S3(3-)*3Na(1+)

Conditions	Yield
In dichloromethane; water pH=7;

C84H84N20O12S4 + ponceau 4R (2611-82-7) → C84H84N20O12S4*C20H11N2O10S3(3-)*3Na(1+)

Conditions	Yield
In dichloromethane; water pH=7;

ponceau 4R (2611-82-7) → carbon dioxide (124-38-9)

Conditions	Yield
With AgBr-TiO2 nanoparticles immobilized on polyacrylonitrile In water at 20℃; Reagent/catalyst; Irradiation;

Downstream Products

• 124-38-9 carbon dioxide