Метил винил кетон химические свойства, назначение, производство
Описание
Methyl vinyl ketone (MVK) is a stable, highly flammable, heatand light-sensitive, and colourless liquid. It is incompatible with strong bases, strong oxidising agents, and strong reducing agents and undergoes autopolymerisation. MVK is a reactive organic compound classified as an enone. It is a colourless to yellow, flammable, highly toxic liquid with a pungent odour. It is easily soluble in water, methanol, ethanol, and acetic acid. It can act as an alkylating agent. Its alkylating ability is both the source of its high toxicity and the feature that makes it a useful intermediate in organic synthesis. It polymerises spontaneously and is used in the manufacture of plastic polymers. It is also an intermediate in the synthesis of steroids and vitamin A.
Использование
Alkylating agent; commercial starting material for plastics; as intermediate in the synthesis of steroids and vitamin A.
Определение
ChEBI: Buten-2-one is a methyl ketone that is butan-2-one with an unsaturation at position 3. It is a methyl ketone and an enone. It is functionally related to a butan-2-one and a but-1-ene.
Общее описание
A clear colorless liquid with a pungent odor. Flash point 20 °F. May polymerize with the release of heat under exposure to heat or contamination. Less dense than water. Highly toxic by inhalation. Causes burns to skin, eyes and mucous membranes.
Реакции воздуха и воды
Highly flammable. Miscible with water. Unstable in the presence of heat, light and air.
Профиль реактивности
Methyl vinyl ketone is incompatible with strong oxidizers and strong bases. Methyl vinyl ketone polymerizes spontaneously upon exposure to heat or sunlight. This polymerization may cause violent ruptures in containers. .
Угроза здоровью
Methyl vinyl ketone is readily absorbed through the skin, causing general poisoning, similar to other ketones; inhalation has central nervous system depressant effects. It is irritating to mucous membranes and respiratory tract and to the skin; it is a lachrymator and can cause eye injury.
Пожароопасность
Vapors form flammable mixtures with air, and may travel a considerable distance to a source of ignition and flash back. Polymerization may take place in containers, possibly with violent rupture of containers. Upon exposure to heat or flame, Methyl vinyl ketone emits toxic and irritating fumes. Container may explode in heat of fire. Vapor explosion and poison hazard indoors, outdoors, or in sewers. Polymerizes on standing. Hazardous polymerization may occur. Avoid heat or sunlight.
Профиль безопасности
Poison by ingestion,
inhalation, and intraperitoneal routes. A
severe irritant to skin, eyes, and mucous
membranes. A lachrymator. Mutation data
reported. See also KETONES. Dangerous
fire hazard when exposed to heat, flame, or
oxidizers. To fight fire, use CO2, dry
chemical. When heated to decomposition it
emits acrid smoke and fumes.
Возможный контакт
Methyl vinyl ketone is used as an
alkylating agent, a starting material for plastics; and an
intermediate in the synthesis of steroids and Vitamin A.
Перевозки
UN1251 Methyl vinyl ketone, stabilized, Hazard
class: 6.1; Labels: 6.1-Poison Inhalation Hazard,
3-Flammable liquid, 8-Corrosive material, Inhalation Zone A.
Методы очистки
It forms an 85% azeotrope with water. After drying with K2CO3 and CaCl2 (with cooling), the ketone is distilled at low pressures. [Beilstein 1 IV 3444.]
Несовместимости
Vapors may form explosive mixture with
air. Heat or shock may cause explosive polymerization.
Incompatible with oxidizers (chlorates, nitrates, peroxides,
permanganates, perchlorates, chlorine, bromine, fluorine,
etc.); contact may cause fires or explosions. Keep away
from alkaline materials, strong bases, strong acids,
oxoacids, epoxides, nitrated amines, azo, diazo, azido
compounds, carbamates, organic cyanates.
Метил винил кетон препаратная продукция и сырье
сырьё
препарат