dye|World dye variety

Name:C.I.Food Red 9,C.I.16185

Molecular Structure: Single azo class

C.I.Food Red 9,C.I.16185,CAS 915-67-3,604.48,C20H11N2Na3O10S3

Molecular Formula:C₂₀H₁₁N₂Na₃O₁₀S₃

Molecular Weight: 604.48

CAS Registry Number:915-67-3

Manufacturing Methods : 4-Aminonaphthalene-1-sulfonic acid diazo, coupled with 3-Hydroxynaphthalene-2,7-disulfonic acid.

Properties and Applications: blu-ray red. Reddish brown powder. Slightly soluble in water for product red, soluble in 30% ethanol, glycerin and thin syrup, slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for purple, diluted for pink; In nitric acid solution for colourful red; In the red brown solution for hydrochloric acid, a black precipitation; In the thick of sodium hydroxide solution for red brown. LD50 (rat intraperitoneal injection) > 1000 mg/kg. ADI is tentatively set: 0-0.75 mg/kg. And C.I. Acid Red 27 the same chemical structure.

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