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Food Red 7

Name:C.I.Food Red 7,C.I.16255

Molecular Structure: Single azo class

C.I.Food Red 7,C.I.16255,CAS 2611-82-7,604.48,C20H11N2Na3O10S3

C.I.Food Red 7,C.I.16255,CAS 2611-82-7,604.48,C20H11N2Na3O10S3

Molecular Formula:C20H11N2Na3O10S3

Molecular Weight: 604.48

CAS Registry Number:2611-82-7

Manufacturing Methods :  4-Hydroxynaphthalene-1-sulfonic acid diazo, and 7-Hydroxynaphthalene-1,3-disulfonic acid coupling.

Properties and Applications:  red. Deep red powder. Soluble in water for red, slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for purple, diluted into red orange; In nitric acid solution for yellow. Its water solution with strong hydrochloric acid for red; Add thick sodium hydroxide solution for brown. LD50 (rat through the mouth) > 8000 mg/kg. ADI: 0-0.125 mg/kg. And C.I. Acid red 18 the same chemical structure.

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