With the CAS registry number 12269-99-7, C.I. Acid Red 226(8CI,9CI) is also named as Chromate (1-), bis[2, 4-dihydro-4-[[2-hydroxy-4(or 5)-nitrophenyl]azo]-5-methyl-2-phenyl-3H-phrazol-3-onato(2-)], sodium. The product's categories are Dye; Acid Dye; Neutral Dye. Besides, it is red powder, which is slightly soluble in water.
Preparation and Uses of C.I. Acid Red 226(8CI,9CI): please diazotize 2-Amino-5-nitrophenol. And then put the resultant to couple with 1,2-Dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one. Afterwards, add Chrome alum to complex. You will obtain this chemical after filtration and drying. Moreover, this product is used for spraying of leather and curtain.
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