Acid Red 18 Chemical Properties

Melting point:

>300oC

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)

Colour Index 

16255

form 

Powder

color 

Bordeaux to brown

Water Solubility 

305.21g/L at 20℃

BRN 

4122340

Stability:

Hygroscopic

InChI

InChI=1S/C20H14N2O10S3.Na.H/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;;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;/b22-21+;;

InChIKey

MSUZYPTYNUUBFH-ZPZFBZIMSA-N

SMILES

N(/C1=C(C=CC2=CC(S(O)(=O)=O)=CC(S(O)(=O)=O)=C12)O)=N\C1=CC=C(S(O)(=O)=O)C2=CC=CC=C12.[NaH]

LogP

-2.267 at 20℃

EPA Substance Registry System

C.I. Acid Red 18, trisodium salt (2611-82-7)

Safety Information

Safety Statements 

22-24/25

WGK Germany 

2

RTECS 

QJ6530000

HS Code 

32041200

Hazardous Substances Data

2611-82-7(Hazardous Substances Data)

Toxicity

LD50 oral in rat: > 8gm/kg

MSDS

• Language:English Provider:C.I. 16255
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich

Acid Red 18 Usage And Synthesis

Chemical Properties

Deep red powder

Uses

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

Non flammable

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.

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.]

Acid Red 18(2611-82-7)Related Product Information

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• EOSIN
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