м-крезол
- английское имяm-Cresol
- CAS №108-39-4
- CBNumberCB7852747
- ФормулаC7H8O
- мольный вес108.14
- EINECS203-577-9
- номер MDLMFCD00002302
- файл Mol108-39-4.mol
химическое свойство
| Температура плавления | 8-10 °C(lit.) |
| Температура кипения | 203 °C(lit.) |
| плотность | 1.034 g/mL at 25 °C(lit.) |
| плотность пара | 3.72 (vs air) |
| давление пара | <1 mm Hg ( 20 °C) |
| FEMA | 3530 | M-CRESOL |
| показатель преломления | n |
| Fp | 187 °F |
| температура хранения | Store below +30°C. |
| растворимость | 23.5g/l; Soluble 2 % in water, soluble in alcohol and oils. |
| пка | 10.01(at 25℃) |
| форма | Liquid |
| цвет | Clear colorless to slight red |
| РН | 5 (20g/l, H2O, 20℃) |
| Запах | Dry-tarry, medicinal-leathery odor |
| Биологические источники | synthetic |
| Порог?обнаружения?запаха? | 0.0001ppm |
| Odor Type | phenolic |
| Пределы взрываемости | 1.06-1.35%, 150°F |
| Растворимость в воде | 20 g/L (20 ºC) |
| λмакс | 273nm(lit.) |
| Номер JECFA | 692 |
| Мерк | 14,2579 |
| БРН | 506719 |
| Диэлектрическая постоянная | 11.5 |
| Пределы воздействия | ACGIH: TWA 20 mg/m3 (Skin) NIOSH: IDLH 250 ppm; TWA 2.3 ppm(10 mg/m3) |
| Стабильность | Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, strong acids, aluminium, aluminium alloys. Air and light sensitive. Hygroscopic. |
| LogP | 1.96 |
| Вещества, добавляемые в пищу (ранее EAFUS) | M-CRESOL |
| FDA 21 CFR | 310.545 |
| Справочник по базе данных CAS | 108-39-4(CAS DataBase Reference) |
| Рейтинг продуктов питания EWG | 5 |
| FDA UNII | GGO4Y809LO |
| Справочник по химии NIST | Phenol, 3-methyl-(108-39-4) |
| Система регистрации веществ EPA | m-Cresol (108-39-4) |
| UNSPSC Code | 41116107 |
| NACRES | NA.24 |
больше
| Коды опасности | T | |||||||||
| Заявления о рисках | 24/25-34-39/23/24/25-23/24/25 | |||||||||
| Заявления о безопасности | 36/37/39-45-36/37 | |||||||||
| РИДАДР | UN 2076 6.1/PG 2 | |||||||||
| OEB | B | |||||||||
| OEL | TWA: 2.3 ppm (10 mg/m3) | |||||||||
| WGK Германия | 1 | |||||||||
| RTECS | GO6125000 | |||||||||
| F | 8 | |||||||||
| Температура самовоспламенения | 626 °C | |||||||||
| TSCA | Yes | |||||||||
| Класс опасности | 6.1 | |||||||||
| Группа упаковки | II | |||||||||
| кода HS | 29071200 | |||||||||
| Банк данных об опасных веществах | 108-39-4(Hazardous Substances Data) | |||||||||
| Токсичность | LD50 orally in rats: 2.02 g/kg (Deichmann, Witherup) | |||||||||
| NFPA 704: |
|
рисовальное письмо(GHS)
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рисовальное письмо(GHS)
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сигнальный язык
опасность
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вредная бумага
H314：При попадании на кожу и в глаза вызывает химические ожоги.
H301+H311：Токсично при проглатывании или при контакте с кожей.
H412：Вредно для водных организмов с долгосрочными последствиями.
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оператор предупредительных мер
P270：При использовании продукции не курить, не пить, не принимать пищу.
P273：Избегать попадания в окружающую среду.
P280：Использовать перчатки/ средства защиты глаз/ лица.
P303+P361+P353：ПРИ ПОПАДАНИИ НА КОЖУ (или волосы): Снять/удалить немедленно всю загрязненную одежду. Промыть кожу водой.
P304+P340+P310：ПРИ ВДЫХАНИИ: Свежий воздух, покой. Немедленно обратиться за медицинской помощью.
P305+P351+P338：ПРИ ПОПАДАНИИ В ГЛАЗА: Осторожно промыть глаза водой в течение нескольких минут. Снять контактные линзы, если Вы ими пользуетесь и если это легко сделать. Продолжить промывание глаз.
м-крезол химические свойства, назначение, производство
Химические свойства
m-Cresol has a dry, tarry, medicinal–leathery odor. m-Cresol and p-cresol very often occur together and are difficult to separate.Вхождение
Reported found in beer, coffee, egg, grape, Oriental tobacco, roasted barley, rum, sherry and whiskey.Использование
m-Cresol is used as a disinfectant and solvent. LysolTM disinfectant is a 50% (v/v) mixed-cresol isomer in a soap emulsion formed on mixing with water. The isomer m-cresol is an oily liquid with low volatility. Besides disinfection at solutions of 1–5%, the cresols are used in degreasing compounds, paintbrush cleaners, and additives in lubricating oils. Cresols were once widely used for disinfection of poultry houses, but this use has been discontinued because they cause respiratory problems and abdominal edema in young chicks. m-Cresol has been used in synthetic resins, explosives, petroleum, photographic, paint, and agricultural industries.Подготовка
One process involving butylation and separation and followed by dealkylation produces m-cresol and ditertiary butyl p-cresol. From m, p-cresol (which is the main product of the recovery process) pure m-cresol can be obtained by extraction.Методы производства
The cresols (cresylic acids) are methyl phenols and generally appear as a mixture of isomers. m-Cresol is prepared from m-toluic acid or obtained from coal tar or petroleum (352, 355, 356). Crude cresol is obtained by distilling “gray phenic acid” at a temperature of ～180–201°C. The m-cresol may be separated from the crude or purified mixture by repeated fractional distillation in vacuo. It can also be prepared synthetically by diazotization of the specific toluidine or by fusion of the corresponding toluenesulfonic acid with sodium hydroxide.Определение
ChEBI: M-cresol is a cresol with the methyl substituent at position 3. It is a minor urinary metabolite of toluene. It has a role as a human xenobiotic metabolite.Общее описание
Colorless liquid with a sweet tarry odor. Sinks and mixes slowly with water.Реакции воздуха и воды
Water soluble.Профиль реактивности
m-Cresol is sensitive to air, light and heat. m-Cresol is also hygroscopic. m-Cresol can react vigorously with strong oxidizers and strong bases. m-Cresol reacts violently with nitric acid, oleum, chlorosulfonic acid, metals and strong acids. If the water content is below approximately 0.3% and the temperature above 248° F, the corrosion of aluminum and its alloys may occur violently. m-Cresol will attack some forms of plastics, coatings and rubber.Опасность
Questionable carcinogen.Угроза здоровью
INHALATION: Mucosal irritation and systemic poisoning EYES: Intense irritation and pain, swelling of conjunctiva, and corneal damage may occur. SKIN: Intense burning, loss of feeling, wrinkling, white discoloration, and softening. Gangrene may occur. INGESTION: Burning sensation in mouth and esophagus. Vomiting may result. Acute exposure by all routes may cause muscular weakness, gastroenteric disturbances, severe depression, collapse. Effects are primarily on CNS and edema of lungs. Injury of spleen and pancreas may occur.Контактные аллергены
Metacresol is contained as a preservative in almost all human insulin. It has been reported as a cause of allergic reaction due to injected insulin.Профиль безопасности
v Poison by ingestion, intravenous, intraperitoneal, and subcutaneous routes. Moderately toxic by skin contact. Severe eye and skin irritant. An experimental teratogen. Human mutation data reported. Questionable carcinogen with experimental neoplastigenic data. Flammable when exposed to heat or flame. Moderately explosive in the form of vapor when exposed to heat or flame. See also other cresol entries and PHENOL.Возможный контакт
Cresol is used as a disinfectant and fumigant; as an ore flotation agent, and as an intermediate in the manufacture of chemicals, dyes, plastics, and antioxidants. A mixture of isomers is generally used; the concentrations of the components are determined by the source of the cresol.Канцерогенность
m-Cresol has induced a few papillomas but no carcinomas in tumor studies.Перевозки
UN2076 Cresols, liquid, Hazard class: 6.1; Labels: 6.1-Poisonous materials, 8-Corrosive material. UN3455 Cresols, solid, Hazard class: 6.1; Labels: 6.1- Poisonous materials, 8-Corrosive material.Несовместимости
Vapors may form explosive mixture with air. Incompatible with strong acids; oxidizers, alkalies, aliphatic amines; amides, chlorosulfonic acid; oleum. Decomposes on heating, producing strong acids and bases, causing fire and explosion hazard. Liquid attacks some plastics and rubber. Attacks many metals.Утилизация отходов
Wastewaters may be subjected to biological treatment. Concentrations may be further reduced by ozone treatment. High concentration wastes may be destroyed in special waste incinerators.м-крезол запасные части и сырье
сырьё
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м-крезол поставщик
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