セレン(VI)ヘキサフルオリド 化学特性,用途語,生産方法
化学的特性
Selenium hexafluoride is a nonflammable, colorless gas. Repulsive odor.
物理的性質
Colorless gas; refractive index 1.895; density 3.25 g/L at -28°C; liquefies at -34.5°C; freezes at -50.8°C; sublimes at -63.8°C; insoluble in water.
使用
Selenium hexafluoride is used as a gaseous electric insulator
(146). It may be prepared by passing gaseous fluorine over
finely divided selenium in a copper vessel. Industrial selenium
exposure is common for makers of arc light electrodes,
electric rectifiers, and semiconductors.
製造方法
Selenium hexafluoride is prepared by passing fluorine gas over finely divided selenium in a copper vessel:
Se + 3F
2 → SeF
6.
一般的な説明
SELENIUM HEXAFLUORIDE is a colorless gas used as a electrical insulator. SELENIUM HEXAFLUORIDE is highly toxic by inhalation. When heated to high temperatures SELENIUM HEXAFLUORIDE may decompose to emit toxic fluoride and selenium fumes. Prolonged exposure of the container to fire or intense heat may cause SELENIUM HEXAFLUORIDE to violently rupture or rocket.
空気と水の反応
Insoluble in water.
反応プロフィール
SELENIUM HEXAFLUORIDE is a colorless, poison gas, when heated to decomposition SELENIUM HEXAFLUORIDE emits very toxic fumes containing metallic selenium and selenium fluorides [Lewis, 3rd ed., 1993, p. 1131].
健康ハザード
TOXIC; may be fatal if inhaled, ingested or absorbed through skin. Vapors are extremely irritating and corrosive. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution.
火災危険
Some may burn but none ignite readily. Vapors from liquefied gas are initially heavier than air and spread along ground. Some of these materials may react violently with water. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.
安全性プロファイル
Poison by inhalation. When heated to decomposition it emits very toxic fumes of Fand Se. See also SELENIUM COMPOUNDS and FLUORIDES.
職業ばく露
Selenium hexafluoride, a gas, is utilized as a gaseous electric insulator.
輸送方法
Selenium hexafluoride, Hazard Class: 2.3; Labels: 2.3-Poisonous gas, 8-Corrosive material Inhalation, Hazard Zone A. Cylinders must be transported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.
不和合性
Hydrolyzes very slowly in cold water. Decomposes on heating, producing hydrogen fluoride, fluoride, and selenium. Contact with metal or acid will produce toxic gaseous hydrogen selenide.
廃棄物の処理
Return refillable compressed gas cylinders to supplier. If possible, convert selenium compounds to an insoluble form with SO2 before landfill or solidification.
セレン(VI)ヘキサフルオリド 上流と下流の製品情報
原材料
準備製品