Диметилдисульфид
- английское имяDimethyl disulfide
- CAS №624-92-0
- CBNumberCB8229876
- ФормулаC2H6S2
- мольный вес94.2
- EINECS210-871-0
- номер MDLMFCD00008561
- файл Mol624-92-0.mol
химическое свойство
| Температура плавления | -85 °C |
| Температура кипения | 109 °C(lit.) |
| плотность | 1.0625 |
| плотность пара | 3.24 (vs air) |
| давление пара | 22 mm Hg ( 20 °C) |
| показатель преломления | n |
| FEMA | 3536 | DIMETHYL DISULFIDE |
| Fp | 76 °F |
| температура хранения | Flammables area |
| растворимость | 2.7g/l |
| форма | Liquid |
| Удельный вес | 1.0647 (20/4℃) |
| цвет | Clear yellow |
| Запах | at 0.10 % in propylene glycol. sulfurous vegetable cabbage onion |
| Odor Type | sulfurous |
| Вязкость | 0.594mm2/s |
| Пределы взрываемости | 1.1-16.1%(V) |
| Порог?обнаружения?запаха? | 0.0022ppm |
| Растворимость в воде | <0.1 g/100 mL at 20 ºC |
| Номер JECFA | 564 |
| БРН | 1730824 |
| Пределы воздействия | ACGIH: TWA 0.5 ppm (Skin) |
| Диэлектрическая постоянная | 9.7699999999999996 |
| Стабильность | Stable. Incompatible with strong bases, strong oxidizing agents, strong reducing agents. Flammable. |
| ИнЧИКей | WQOXQRCZOLPYPM-UHFFFAOYSA-N |
| LogP | 1.91 at 20℃ |
| Вещества, добавляемые в пищу (ранее EAFUS) | METHYL DISULFIDE |
| Справочник по базе данных CAS | 624-92-0(CAS DataBase Reference) |
| Словарь онкологических терминов NCI | MDS |
| FDA UNII | 3P8D642K5E |
| Справочник по химии NIST | Disulfide, dimethyl(624-92-0) |
| Система регистрации веществ EPA | Methyl disulfide (624-92-0) |
больше
| Коды опасности | F,Xn,N,T+ | |||||||||
| Заявления о рисках | 11-20/22-36-51/53-36/37/38-26-22-36/37 | |||||||||
| Заявления о безопасности | 26-61-45-38-36/37/39-28A-16-60-57-39-29 | |||||||||
| РИДАДР | UN 2381 3/PG 2 | |||||||||
| WGK Германия | 2 | |||||||||
| RTECS | JO1927500 | |||||||||
| Температура самовоспламенения | 304 °C | |||||||||
| TSCA | Yes | |||||||||
| Класс опасности | 3 | |||||||||
| Группа упаковки | II | |||||||||
| кода HS | 29309070 | |||||||||
| Банк данных об опасных веществах | 624-92-0(Hazardous Substances Data) | |||||||||
| Токсичность | LD50 orally in Rabbit: 290 - 500 mg/kg | |||||||||
| 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
H319：При попадании в глаза вызывает выраженное раздражение.
H317：При контакте с кожей может вызывать аллергическую реакцию.
H301+H331：Токсично при проглатывании или при вдыхании.
H410：Чрезвычайно токсично для водных организмов с долгосрочными последствиями.
H225：Легковоспламеняющаяся жидкость. Пары образуют с воздухом взрывоопасные смеси.
H336：Может вызывать сонливость или головокружение.
H370：Поражает органы (Глаза) в результате однократного воздействия.
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оператор предупредительных мер
P210：Беречь от тепла, горячих поверхностей, искр, открытого огня и других источников воспламенения. Не курить.
P273：Избегать попадания в окружающую среду.
P280：Использовать перчатки/ средства защиты глаз/ лица.
P301+P310：ПРИ ПРОГЛАТЫВАНИИ: Немедленно обратиться за медицинской помощью. Прополоскать рот.
P303+P361+P353：ПРИ ПОПАДАНИИ НА КОЖУ (или волосы): Снять/удалить немедленно всю загрязненную одежду. Промыть кожу водой.
P304+P340+P311：ПРИ ВДЫХАНИИ: Свежий воздух, покой. Обратиться за медицинской помощью.
Диметилдисульфид химические свойства, назначение, производство
Описание
Dimethyl disulfide has a diffuse intense onion odor. It is nonlachrymatory. Ironically, although many find its odor objectionable at high concentrations as noted above, when diluted, its aroma has also been described as pleasant. Dimethyl disulfide is often used in combination with other flavor compounds in food products, including baked goods, cheese, frozen dairy products, meat products, soups, savory flavors, fruit flavors, soft candy, gelatin, puddings, and both alcoholic and nonalcoholic beverages.Химические свойства
colourless to yellow liquid with a very unpleasant smell, insoluble in water, Soluble in ethanol, ethyl ether and acetic acid. It is a strong odor component irritant which is also included in garlic and has been designated as a specific malodorous substances based on the Offensive Odor Control Law. Its detection threshold shows 0.002 ppm, which senses a low concentration equivalent to Dimethyl sulfide.Вхождение
Reported found in sour cherry, guava, melon, peach, pineapple, strawberry, cabbage, kohlrabi, onion, garlic, shallot, leek, chive, peas, potato, rutabaga, tomato, parsley, breads, many cheeses, yogurt, milk, egg, fish, meats, hop oil, beer, Scotch whiskey, cognac, grape wines, cocoa, coffee, peanut, peanut butter, pecan, potato chips, oats, soybean, beans, mushrooms, trassi, macadamia nut, mango, cauliflower, broccoli, brussels sprouts, rice, radish, sukiyaki, sake, watercress, malt, wort, krill, southern pea, loquat, sapodilla, shrimp, oyster, crab, crayfish, clam, scallops and squid.Использование
Dimethyl disulfide is used as an intermediate as well as a food additive in onion, garlic, cheese, meats, soups, savory flavors and fruit flavors. It is used in oil refineries as a sulfiding agent. It is used to alfa substitute 2-methylfuran-acrolein to produce food stuff. It is involved in the preparation of 4-(methylthio)phenol. Further, it is used to replace methyl mercaptan as a jet fuel additive. It finds application in artificial flavoring agent and a corrosion inhibitor. In addition to this, it serves as an effective soil fumigant in agriculture.Определение
ChEBI: Dimethyl disulfide is an organic disulfide that is methane in which one of the hydrogens has been replaced by a methyldisulfanyl group. It has a role as a xenobiotic metabolite.Подготовка
Dimethyl disulfide can be prepared by the reaction between imethyl sulfate and sodium sulfide. under stirring, sulfur powder was added into sodium sulfide solution. The above reaction system was heated Up to 80-90℃, after reaction for 1 h, cooled to about 30 ℃. Dimethyl sulfate was dropped into the reaction system and the reaction was continued for 2h. Then, distillation, stratification, Separating waste alkali liquor, then through distillation and final products are prepared.In industry,dimethyl sulfate method is adopted to synthesize dimethyl disulfide.
Na2S+S→Na2S2Na2S2+(CH3)2SO4→CH3SSCH3+Na2SO4
From magnesium methyl iodide and S2Cl2, or from S2S2 and sodium methyl sulfate; also from methyl bromide and sodium thiosulfate, after which the resulting sodium methylthiosulfate is heated to yield dimethyl disulfide.
Общее описание
A colorless oily liquid with a garlic-like odor. Denser than water and slightly soluble in water. Flash point 40°F. Vapors heavier than air. May irritate skin and eyes. Used to make other chemicals.Реакции воздуха и воды
Highly flammable. Slightly soluble in water.Профиль реактивности
DMDS is a reducing agent. A dangerous fire hazard when exposed to oxidizing materials. Emits toxic fumes of oxides of sulfur when heated to decomposition or on contact with acids [Sax, 9th ed., 1996, p. 1320].Угроза здоровью
May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.Пожароопасность
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.Профиль безопасности
Poison by inhalation. A very dangerous fire hazard when exposed to heat, flame, or oxidzers. Can react vigorously with oxiduing materials. See also SULFIDES.Методы очистки
Pass it through neutral alumina before use. [Trost Chem Rev 78 363 1978, Beilstein 1 IV 1281.]Диметилдисульфид запасные части и сырье
Диметилдисульфид поставщик
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