Difluoromethane химические свойства, назначение, производство
Химические свойства
Difluoromethane is a colorless and flammable gas that has a light ethereal odor with poor warning properties.
Использование
Difluoromethane is use as refrigerant, as an important component in some refrigeration mixtures, and as a reactive ion etching gas in semiconductor materials processing applications.
Подготовка
Difluoromethane(HFC-32) is manufactured in closed systems. Possible routes are hydrodechlorination of chlorodifluoromethane (HCFC-22) and hydrofluorination of dichloromethane.
Определение
ChEBI: Difluoromethane is a member of fluoromethanes. It has a role as a refrigerant.
Общее описание
A colorless odorless gas. Insoluble in water and has a high thermal stability. Its vapors are heavier than air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. Contact with the unconfined liquid can cause frostbite. Used as a refrigerant.
Реакции воздуха и воды
Highly flammable. Insoluble in water. Easily ignited by heat, sparks or flames. Forms explosive mixtures with air
Профиль реактивности
Difluoromethane can react with some metals to form dangerous products. May react violently with aluminum. Incompatible with strong oxidizing and reducing agents. Also incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.
Угроза здоровью
Vapors may cause dizziness or asphyxiation without warning. Some may be irritating if inhaled at high concentrations. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating and/or toxic gases.
Пожароопасность
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. CAUTION: Hydrogen (UN1049), Deuterium (UN1957), Hydrogen, refrigerated liquid (UN1966) and Methane (UN1971) are lighter than air and will rise. Hydrogen and Deuterium fires are difficult to detect since they burn with an invisible flame. Use an alternate method of detection (thermal camera, broom handle, etc.) Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.
Difluoromethane препаратная продукция и сырье
сырьё
препарат