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The General Analysis of Solvent yellow 21

Solvent yellow 21 is referred to by many names including Yellow FR, Yellow 2GL, Tirasol Yellow, Acid Yellow 161 and Filamid Yellow R. It has good compatibility and dissolubility in all kinds of organic solvent, synthetic and natural resin.
As is well-known, Solvent yellow 21 also has excellent heat stability, light stability, dissolubility as well as strong stain ability. It mainly be applied in dyeing resin, transparent paint, aluminium-foil paper, wood, blocking materials and leather.
The production of Solvent yellow 21 is 2-Aminobenzoic acid diazotization and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling, and then in formamide solution in 113 ~ 115 ℃ and Chromium formate heating 6 hours, form Chromium complex, 1 mol chrome on 2 Moore dye.
TongShun Chemical Co, Ltd, set up in 2008, is a modern enterprise manufacturing solvent dyes, fluorescent pigments dyes and dyestuff intermediates. Currently, our products are exported to dozens of countries abroad.
Our solvent dyes and pigments are widely used in plastic, fiber masterbatch, paint, printing ink, etc.; most of our products comply with relative EU legislation in regard to heavy metal and aromatic amine. Quality and innovation are what we guarantee to achieve customers’satisfactions.