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| J-acid urea( sodium salt) |
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| C21H14N2NA2O9S2 |
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| 20324-87-2 |
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| used as azo medium. Mainly used for the preparation of direct orange S and direct acid-proof bright-red 4BS |
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Coupling value ¡Ã70% Free J-acid ¡Â1.5% Insoluble ¡Â0.2% Apprearance: Brown powder |
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