3-хлорбензойная кислота
3-хлорбензойная кислота атрибут
| Температура плавления: |
153-157 °C (lit.) |
| Температура кипения: |
274-276°C |
| плотность: |
1.496 |
| показатель преломления: |
1.5812 (estimate) |
| Fp: |
150 °C |
| температура хранения: |
Store below +30°C. |
| растворимость: |
0,45 г/л |
| пка: |
3.82(at 25℃) |
| форма: |
Кристаллический порошок |
| цвет: |
От белого до бежевого |
| Растворимость в воде: |
<0,1 г/100 мл при 19,5 °C |
| Мерк: |
14,2123 |
| БРН: |
907218 |
| Стабильность:: |
Раздражает кожу, глаза и дыхательные пути. |
| Справочник по базе данных CAS: |
535-80-8(CAS DataBase Reference) |
| Рейтинг продуктов питания EWG: |
1 |
| FDA UNII: |
02UOJ7064K |
| Справочник по химии NIST: |
Benzoic acid, 3-chloro-(535-80-8) |
| Система регистрации веществ EPA: |
m-Chlorobenzoic acid (535-80-8) |
3-хлорбензойная кислота химические свойства, назначение, производство
Химические свойства
white to light yellow crystal powder
Использование
A Pseudomonas species which utilized 3-chlorobenzoic acid as a carbon source converted this compound to 3-hydroxybenzoic and 2, 5-dihydroxybenzoic acids. A methanogenic consortium able to use 3-chlorobenzoic acid as its sole energy and carbon source was enriched from anaerobic sewage sludge. A Pseudomonas putida strain 87 capable of assimilating 3-chlorobenzoic acid as a sole source of carbon and energy (3Cba+) was isolated. coupling of 3-chlorobenzoic acid with phenylboronic acid proceeds at room temperature using 0.5 % Pd and at 100°C using 0.1 % Pd to provide the coupled product in 97 % yeild.
Общее описание
Crystals or fluffy white powder.
Реакции воздуха и воды
Insoluble in water.
Профиль реактивности
3-Chlorobenzoic acid is incompatible with strong oxidizing agents. The reactivity of the chlorine atom of 3- chlorobenzoic acid is sluggish compared with the other isomers. Decarboxylation at higher temperatures is insignificant, and it resists oxidation. 3-Chlorobenzoic acid is made by the oxidation of 3-chlorotoluene or by the hydrolysis of 3-chlorobenzoyl chloride, which is derived from benzoyl chloride. 3-Chlorobenzoic acid is used for making diphenyl ether type herbicides.
Пожароопасность
Flash point data for 3-Chlorobenzoic acid are not available; however, 3-Chlorobenzoic acid is probably combustible.
Методы очистки
Crystallise the acid successively from glacial acetic acid, aqueous EtOH and pet ether (b 60-80o). It also recrystallises from *C6H6 or Et2O/hexane, and sublimes at 55o in a vacuum. [Anal Chem 26 726 1954] The methyl ester has m 21o, b 231o/760mm. The S-benzylisothiouronium salt has m 164-165o (from EtOH) [Friediger & Pedersen Acta Chem Scand 9 1425 1955, Samuel J Chem Soc 1318 1960]. [Beilstein 9 IV 969.]
3-хлорбензойная кислота препаратная продукция и сырье
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препарат
3-хлорбензойная кислота поставщик
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535-80-8(3-хлорбензойная кислота)подобный поиск: