Альфа-метилстирол химические свойства, назначение, производство
Химические свойства
clear colourless liquid
Физические свойства
Colorless liquid with a sharp aromatic odor. Odor threshold concentration is 290 ppb (quoted,
Amoore and Hautala, 1983).
Использование
Polymerization monomer, especially forpolyesters.
Методы производства
α-Methylstyrene (AMS) is produced as a by-product in the production of phenol and acetone from cumene.
Общее описание
A colorless liquid. Insoluble in water and less dense than water. Flash point 115°F. May be mildly toxic by ingestion, inhalation and skin absorption. Vapors may be narcotic by inhalation. Used as a solvent and to make other chemicals.
Реакции воздуха и воды
Flammable. Oxidizes readily in air to form unstable peroxides that may explode spontaneously [Bretherick, 1979 p.151-154, 164]. Insoluble in water.
Профиль реактивности
2-Phenyl-1-propene is easily peroxidizable; the peroxide may initiate exothermic polymerization of the bulk material. Reacts violently with strong oxidizing agents [Handling Chemicals Safely, 1980 p. 866; Bretherick, 1979 p. 160].
Опасность
Moderate fire risk. Explosive limits in air1.9–6.1%. Avoid inhalation and skin contact. Upperrespiratory tract irritant, kidney and female repro-ductive damage. Possible carcinogen.
Угроза здоровью
Inhalation causes irritation of respiratory tract, headache, dizziness, light-headedness, and breathlessness. Ingestion causes irritation of mouth and stomach. Contact with liquid irritates eyes. Prolonged skin contact can cause severe rashes, swelling, and blistering.
Профиль безопасности
Mildly toxic by
inhalation. Human systemic effects by
inhalation: irritant effects. A skin and eye
irritant. Flammable when exposed to heat or
flame; can react vigorously with oxidizing
materials. When heated to decomposition it
emits acrid smoke and irritating fumes.
Возможный контакт
Methylstyrene is used as additive,
plasticizer, and copolymer; used in the production of
modified polyester and alkyd resin formulations.
Экологическая судьба
Chemical/Physical. Polymerizes in the presence of heat or catalysts (Hawley, 1981).
Перевозки
UN2303 Isopropenylbenzene, Hazard Class: 3;
Labels: 3-Flammable liquid
Методы очистки
Wash the monomer three times with aqueous 10% NaOH (to remove inhibitors such as quinol), then six times with distilled water, dry with CaCl2 and distil it unde
Несовместимости
Vapors may form explosive mixture
with air. 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, peroxides, halogens, catalysts for vinyl or ionic
polymers; aluminum, iron chloride; copper. Methylstyrene
may form unstable peroxides; may polymerize. Usually
contains an inhibitor, such as tert-butyl catechol.
Утилизация отходов
ncineration, often by admixture with a more flammable solvent
Альфа-метилстирол препаратная продукция и сырье
сырьё
препарат
Antioxidant ZM-405
High temperature levelling agent BOF
ТРИФЕНИЛФОСФАТ
1- (1-циклопроп-2-енил) -2-метилбензол
Атропальдегид
Benzene, 1,1'-(1,4-dimethyl-1,3-butadiene-1,4-diyl)bis-
1H-Indene, 2,3-dihydro-1,1-dimethyl-3-phenyl-
1,1,2,3,3-пентаметилиндан
METHYLCINNAMALDEHYDE