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CAS Number：621-23-8
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SMILES：CAS 621-23-8 refers to the chemical compound 2-Methoxyphenol, also known as Guaiacol. It is an organic compound with the molecular formula C7H8O2 and a molecular weight of 124.14 g/mol. Guaiacol is a colorless to yellowish liquid with a characteristic odor and is soluble in water, ethanol, and ether.Chemical PropertiesGuaiacol is an aromatic compound with a phenolic hydroxyl group and a methoxy group. It is a weak acid with a pKa of 10.3. The compound is relatively stable under normal conditions but can undergo oxidation to form quinones. Guaiacol can also react with halogens, nitric acid, and sulfuric acid.ApplicationsGuaiacol has various applications in different industries. It is used as a flavoring agent in the food industry and as a fragrance in the cosmetic and perfume industry. Guaiacol is also used in the pharmaceutical industry as an expectorant and as an antiseptic in dental procedures.In the chemical industry, Guaiacol is used as a precursor to synthesize vanillin, an important flavoring agent. Guaiacol is also used as a solvent for polymers and resins.Guaiacol is used as a marker for the presence of lignin in wood and pulp. It is also used in the production of smoke flavorings used in the food industry.Safety and HandlingGuaiacol is considered a hazardous substance and should be handled with care. It can cause skin and eye irritation and is harmful if ingested or inhaled. The compound is flammable and should be stored away from heat and sources of ignition.In conclusion, Guaiacol or CAS 621-23-8 is an important compound with various applications in different industries. Its unique chemical properties make it a versatile compound that is used as a flavoring agent, fragrance, and solvent. However, it should be handled with care due to its hazardous nature.