Preparation
3-Amino-5-chloro-2-hydroxybenzenesulfonic acid diazotization, with 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling, and its product (C.I. Mordant Red 19) at 125 ℃ in Chromium formate in aqueous solution, heating 3 c to 40 minutes, and make them into Chromium complex, and translated into (2 s) – 1 – (3 – Acetylthio – 2 – methyl – 1 – oxopropyl) – L – proline form.
Properties and Applications
red orange. Soluble in water, alcohol and acetone, insoluble in toluene. In concentrated sulfuric acid to dark red light yellow, dilution after red yellow; In concentrated nitric acid for yellow red solution
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Standard
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Light Fastness
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Heat-resistant(℃)
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water
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Sodium Carbonate(5%)
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Hydrochloric acid(5%)
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Melting point
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Stable
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ISO
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Well
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175
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General
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Dissolve
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Slightly soluble
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