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| | 4-Hydroxy-2-methylbenzoic acid 98 Basic information |
| Product Name: | 4-Hydroxy-2-methylbenzoic acid 98 | | Synonyms: | 4-Hydroxy-2-Methylbenzoic acid 98%;4-hydroxy-o-toluic acid;4-HYDROXY-2-METHYLBE;Benzoic acid, 4-hydroxy-2-Methyl-;4-Hydroxy-o-toluic acid, 4-Carboxy-m-cresol;4-Hydroxy-2-methylbenzoicAcid>;4-Hydroxy-2-Methyl benzoic acid/4-hydroxy-o-toluic acid;2-Methyl-4-hydroxybenzoic acid | | CAS: | 578-39-2 | | MF: | C8H8O3 | | MW: | 152.15 | | EINECS: | 209-422-1 | | Product Categories: | C8;Carbonyl Compounds;Carboxylic Acids | | Mol File: | 578-39-2.mol |  |
| | 4-Hydroxy-2-methylbenzoic acid 98 Chemical Properties |
| Melting point | 177-181 °C | | Boiling point | 339.1±30.0 °C(Predicted) | | density | 1.304±0.06 g/cm3(Predicted) | | storage temp. | Inert atmosphere,Room Temperature | | solubility | soluble in Methanol | | form | powder to crystal | | pka | 4.46±0.25(Predicted) | | color | White to Light yellow to Light orange | | InChI | InChI=1S/C8H8O3/c1-5-4-6(9)2-3-7(5)8(10)11/h2-4,9H,1H3,(H,10,11) | | InChIKey | BBMFSGOFUHEVNP-UHFFFAOYSA-N | | SMILES | C(O)(=O)C1=CC=C(O)C=C1C | | CAS DataBase Reference | 578-39-2 |
| Hazard Codes | Xn | | Risk Statements | 22-41 | | Safety Statements | 26-39 | | WGK Germany | 2 | | HS Code | 29182900 | | Storage Class | 11 - Combustible Solids | | Hazard Classifications | Acute Tox. 4 Oral
Eye Dam. 1 |
| | 4-Hydroxy-2-methylbenzoic acid 98 Usage And Synthesis |
| Chemical Properties | White or pink crystalline powder | | Definition | ChEBI: 4-hydroxy-2-methylbenzoic acid is a hydroxybenzoic acid. | | Synthesis | General procedure for the synthesis of 4-hydroxy-2-methylbenzoic acid from 4-methoxy-2-methylbenzoic acid: boron tribromide (20 mmol, 5 g, 10 eq.) was slowly added to a solution of 4-methoxy-2-methylbenzoic acid (2 mmol, 0.332 g) in dichloromethane (20 mL) under argon protection. The reaction mixture was stirred at room temperature until high performance liquid chromatography (HPLC) analysis showed complete consumption of the feedstock. Subsequently, 0.1 M hydrochloric acid (20 mL) was added to the reaction system to quench the reaction and the insoluble material was removed by filtration. The aqueous phase was concentrated under reduced pressure and the residue was dissolved in methanol and concentrated again under reduced pressure to remove the solvent. This dissolution-concentration process was repeated three times, resulting in purified 4-hydroxy-2-methylbenzoic acid as a yellow solid (0.24 g, 80% yield). | | References | [1] European Journal of Organic Chemistry, 2008, # 5, p. 816 - 825
[2] Patent: WO2006/64286, 2006, A1. Location in patent: Page/Page column 93-94
[3] Patent: WO2007/144379, 2007, A1. Location in patent: Page/Page column 39
[4] Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987, vol. 26, p. 679 - 682
[5] Patent: WO2006/79099, 2006, A2. Location in patent: Page/Page column 68; 69 |
| | 4-Hydroxy-2-methylbenzoic acid 98 Preparation Products And Raw materials |
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