LR-78
4-Dimethylaminobenzoic acid
CAS: 619-84-1
Molecular Formula: C9H11NO2
LR-78 - Names and Identifiers
| Name | 4-Dimethylaminobenzoic acid |
| Synonyms | LR-78 4-(dimethylamino)benzoate 4-Diaminomethylbenzoic acid 4-Dimethylaminobenzoic acid 4-dimethylamino benzoic acid p-(dimethylamino)-benzoicaci 4-(dimethylamino)benzoic acid PARA(DIMETHYLAMINO)BENZOICACID N,N-DIMETHYL-PARA-AMINOBENZOICACID 4-DIMETHYLAMINOBENZOIC ACID FOR SYNTHESI |
| CAS | 619-84-1 |
| EINECS | 210-615-8 |
| InChI | InChI=1/C9H11NO2/c1-10(2)8-5-3-7(4-6-8)9(11)12/h3-6H,1-2H3,(H,11,12)/p-1 |
| InChIKey | YDIYEOMDOWUDTJ-UHFFFAOYSA-N |
LR-78 - Physico-chemical Properties
| Molecular Formula | C9H11NO2 |
| Molar Mass | 165.19 |
| Density | 1,04 g/cm |
| Melting Point | 241-243°C (dec.)(lit.) |
| Boling Point | 117-118 C |
| Flash Point | 170 °C |
| Water Solubility | Insoluble in water. |
| Solubility | DMSO (Slightly), Methanol (Slightly) |
| Vapor Presure | 0.00018mmHg at 25°C |
| Appearance | Crystalline Powder |
| Color | White, beige to grayish green |
| Merck | 14,3232 |
| BRN | 386867 |
| pKa | 6.03, 11.49(at 25℃) |
| Storage Condition | Sealed in dry,Room Temperature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Refractive Index | 1,3715 |
| MDL | MFCD00002537 |
| Physical and Chemical Properties | White Crystal, melting point 241 ℃, soluble in alcohol, hydrochloric acid, alkali solution and ether, almost insoluble in acetic acid. |
| Use | Important intermediates used as photosensitizers, coatings, dye intermediates |
LR-78 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| RTECS | DG8735000 |
| TSCA | Yes |
| HS Code | 29224995 |
LR-78 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | 4-dimethylaminobenzoic acid is an organic intermediate, which can be methylated from ethyl p-aminobenzoate to obtain ethyl 4-dimethylaminobenzoate, the ethyl ester is then hydrolyzed to give 4-dimethylaminobenzoic acid; Or from the coupling of p-chlorobenzoic acid with dimethylamine. |
| preparation | a. Weigh 1g of ethyl p-aminobenzoate in a two-necked round bottom flask, add 40ml of acetone to dissolve, then, 3.6g of anhydrous potassium carbonate and 14.1g of methyl iodide were added, and the reaction was stirred and refluxed at 80 ° C. For 24 hours under the protection of nitrogen. After the reaction was completed, the reaction solution was filtered, and the filtrate was extracted with dichloromethane, the organic phase was dewatered with magnesium sulfate, filtered off magnesium sulfate, and concentrated by evaporation. The product was separated and purified by chromatography column (mobile phase dichloromethane: methanol = 20:1) to obtain the product ethyl 4-dimethylaminobenzoate. B. 10% sodium hydroxide is added to ethyl 4-dimethylaminobenzoate obtained in Step a, the reactant is not passed, 95% ethanol is used as solvent, and the reaction is refluxed at 85°C for 6 hours, adjust the PH to weak acidity with 1M hydrochloric acid, concentrate the reaction solution, dissolve with anhydrous acetone, filter, take the precipitate, and dry under vacuum to obtain 4-dimethylaminobenzoic acid; |
| Applications | intermediates of fine chemicals, synthesis of high-efficiency photosensitive materials, used in photoelectric conversion devices, can be used for coating and ultraviolet radiation. as an important intermediate of photosensitizer, coating and dye intermediates |
Last Update：2024-04-09 21:54:55
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