Solvent Yellow 7
Solvent Yellow 7 is a common azo dye with a formula of C6H5N2C6H4OH.
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Names | |
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IUPAC name
4-Phenyldiazenylphenol | |
Other names
4-Hydroxyazobenzene 4-Phenylazobenzene Solvent Yellow 7 Simpsol Yellow | |
Identifiers | |
3D model (JSmol) |
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ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.015.346 |
EC Number |
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KEGG | |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C12H10N2O | |
Molar mass | 198.225 g·mol−1 |
Appearance | An orange solid[2] |
Melting point | 155 °C (311 °F; 428 K) |
Slightly soluble in hot water | |
Solubility in other solvents | Soluble in ethanol, acetone |
Acidity (pKa) | 8.2 (from the hydroxyl group) |
Hazards | |
Main hazards | Irratant |
Related compounds | |
Related compounds |
Benzenediazonium chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Synthesis
Like most azobenzenes, Solvent Yellow 7 can be synthesized by the reaction of phenyldiazonium salt with phenol. The optimal pH value for this azo coupling is 8.5-10. The reaction is carried out in water, since sodium chloride (or potassium chloride) formed in the reaction is soluble in water, while the product precipitates.[3]
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References
- "4-PHENYLAZOPHENOL". www.chemicalbook.com. Retrieved 2019-04-08.
- Solomons, T.W Graham (2017). Organic chemistry (10 ed.). John Wiley and sons. p. 941. ISBN 1119248973. OCLC 973372285.
- Estibaliz, Merino. "Synthesis of azobenzenes: the coloured pieces of molecular materials" (PDF).
See also
- Benzenediazonium chloride
- Azo compound
- Solvent Yellow 1
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