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Solvent Red 42

Name:C.I.Solvent Red 42,C.I.45366

Molecular Structure: Xanthene class

C.I.Solvent Red 42,C.I.45366,CAS 2320-38-9,470.09,C20H8Cl4O5

C.I.Solvent Red 42,C.I.45366,CAS 2320-38-9,470.09,C20H8Cl4O5

Molecular Formula:C20H8Cl4O5

Molecular Weight: 470.09

CAS Registry Number:2320-38-9

Manufacturing Methods :2,4-Dichlororesorcinol (2 Moore) and Phthalic anhydride (1 Moore) condensation, with Sodium hydroxide extraction segregating out 2 ‘, 4 ‘, 5 ‘, 7 ‘- tetrachlorofluorescein (melting point of 296 ~ 305 ℃), then use Hydrochloric acid acidification.

Properties and Applications:blue light pink. Insoluble in water, soluble in 10% sodium hydroxide solution.

Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%)
Melting point Stable
ISO Poor Poor Insoluble

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