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| | Direct Red 79 Basic information |
| Product Name: | Direct Red 79 | | Synonyms: | direct red 79 2,7-Naphthalenedisulfonic acid, 4,4'-[carbonylbis [imino(5-methoxy-2-methyl-4,1-phenylene) azo]] bis[5-hydroxy-, tetrasodium salt;Urea, N,N'-bis[[4-[[(3,6-disulfo-8-hydroxy) naphthalene-1-yl]azo]-2-methoxy-5-methyl] phenyl]-, tetrasodium salt;Direct red 79 (C.I. 29065);tetrasodium 4,4'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)azo]]bis[5-hydroxynaphthalene-2,7-disulphonate];2,7-Naphthalenedisulfonic acid, 4,4-carbonylbisimino(5-methoxy-2-methyl-4,1-phenylene)azobis5-hydroxy-, tetrasodium salt;Chlorantine Fast Red 6BLL;C.I.DIRECTRED79;4,4'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-7-naphthalenedisulfonic acid | | CAS: | 1937-34-4 | | MF: | C37H28N6Na4O17S4 | | MW: | 1048.8673 | | EINECS: | 217-708-2 | | Product Categories: | Organics | | Mol File: | 1937-34-4.mol |  |
| | Direct Red 79 Chemical Properties |
| | Direct Red 79 Usage And Synthesis |
| Chemical Properties | Soluble in water, aqueous solution is red to bluish red, solubility in water is 15g/L (60℃), 24g/L (97℃), very sensitive to hard water. Adding concentrated hydrochloric acid in aqueous solution produces bluish green precipitate; adding concentrated sodium hydroxide solution shows yellowish orange color. Slightly soluble in ethylene glycol ether, insoluble in other organic solvents. Blue in concentrated sulfuric acid, purple after dilution; blue-black solution in concentrated nitric acid, then blue, finally olive. When stained with copper and iron ions, the color and light change slightly. | | Uses | Direct Red 79 (CAS# 1937-34-4) is an organic azo dye and freshwater pollutant. | | Flammability and Explosibility | Non flammable | | Properties and Applications |
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Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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Fading
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Stain
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Fading
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Stain
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ISO
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4
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3-4
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6
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3
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3
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AATCC
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5
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3
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6
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3
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3
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| | Direct Red 79 Preparation Products And Raw materials |
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