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| | Acid Red 18 Basic information |
| | 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 | | 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) |
| | 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 | 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.
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Standard
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Light Fastness
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Soaping
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Persperation Fastness
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Oxygen bleaching
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Fastness to seawater
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Fading
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Stain
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Fading
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Stain
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Fading
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Stain
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ISO
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4
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2
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3-4
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2
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1-2
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3
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AATCC
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4
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2
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2
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1
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1
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4
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| | 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 Preparation Products And Raw materials |
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