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ヘキサフルオロ硫黄(VI)

ヘキサフルオロ硫黄(VI) 化学構造式
2551-62-4
CAS番号.
2551-62-4
化学名:
ヘキサフルオロ硫黄(VI)
别名:
硫黄(VI)フルオリド;ヘキサフルオロ硫黄(VI);硫黄(VI)ヘキサフルオリド;エレガス;ふっ化硫黄(VI);六ふっ化硫黄;ロクフッ化硫黄;六フッ化イオウ;6フッ化硫黄;6フッ化硫黄(SF6) ;地球温暖化物質(SF6);六フッ化硫黄、;六弗化硫黄
英語化学名:
Sulfur hexafluoride
英語别名:
SF6;Elegas;Esaflon;OC-6-11;SULFURHEXAFLORIDE;Hexafluorosulphane;SULFUR HEXAFLOURIDE;SULFUR HEXAFLUORIDE;sulfurfluoride(sf6);Schwefelhcsafluorid
CBNumber:
CB7724783
化学式:
F6S
分子量:
146.06
MOL File:
2551-62-4.mol

ヘキサフルオロ硫黄(VI) 物理性質

融点 :
−50 °C(lit.)
沸点 :
−64 °C1 mm Hg(lit.)
比重(密度) :
6.602
蒸気密度:
5.11 (vs air)
蒸気圧:
22 mm Hg ( 21.1 °C)
外見 :
colorless gas
水溶解度 :
slightly
Merck :
13,9063
安定性::
Stable. Non-flammable. Explodes on contact with disilane. Reacts with sodium.
CAS データベース:
2551-62-4(CAS DataBase Reference)
NISTの化学物質情報:
Sulfur hexafluoride(2551-62-4)
EPAの化学物質情報:
Sulfur hexafluoride (2551-62-4)
安全性情報
  • リスクと安全性に関する声明
  • 危険有害性情報のコード(GHS)
主な危険性  Xi
Rフレーズ  37
Sフレーズ  38
RIDADR  UN 1080 2.2
WGK Germany  -
RTECS 番号 WS4900000
Hazard Note  Irritant
DOT Classification 2.2 (Nonflammable gas)
国連危険物分類  2.2
有毒物質データの 2551-62-4(Hazardous Substances Data)
化審法 一般化学物質
絵表示(GHS)
注意喚起語 Warning
危険有害性情報
コード 危険有害性情報 危険有害性クラス 区分 注意喚起語 シンボル P コード
H280 加圧ガス;熱すると爆発のおそれ 高圧ガス 高圧ガス
液化ガス
溶解ガス
警告 P410+P403
注意書き
P410 日光から遮断すること。

ヘキサフルオロ硫黄(VI) 価格

メーカー 製品番号 製品説明 CAS番号 包装 価格 更新時間 購入

ヘキサフルオロ硫黄(VI) MSDS


Sulfur hexafluoride

ヘキサフルオロ硫黄(VI) 化学特性,用途語,生産方法

用途

六フッ化硫黄の高い誘電効率および電気火花発生時に電子を補足する性能があるため電子機器装置に利用

効能

診断補助薬 (超音波造影剤)

説明

Sulfur hexafluoride is a colorless, odorless, nontoxic, nonflammable gas that has a high dielectric strength and serves widely as an insulating gas in electrical equipment. At atmospheric pressures it sublimes directly from the solid to the gas phase and does not have a stable liquid phase unless under a pressure of more than 32 psia (221 kPa, abs). It is shipped as a liquefied compressed gas at its vapor pressure of 298 psig at 70°F (2050 kPa at 21.1°C).
One of the most chemically inert gases known, it is completely stable in the presence of most materials to temperatures of about 400°F (204°C) and has shown no breakdown or reaction in quartz at 900°F (482°C). Sulfur hexafluoride is slightly soluble in water and oil. No change in pH occurs when distilled water is saturated with sulfur hexafluoride.

化学的特性

Chemical properties of sulfur hexafluoride are very stable. And compared to selenium hexafluoride, the hydrolysis rate of sulfur hexafluoride is extremely low, this is due to the small radius sulfur atom, which resulting in six fluorine atoms form a larger steric hindrance around. However, the fluorine atom radius is not big, so the repulsive force between the six fluorine atoms is not too large, S-F bond is not easy to dissociate. Enthalpy of formation of sulfur hexafluoride is-1220 kJ/mol, but enthalpy of formation of sulfur hexafluoride is-74 kJ/mol. Thus, the radius of fluorine atom and sulfur atom radius cause the very stable of sulfur hexafluoride molecule together---the molecules themselves are difficult to disconnect bond and break down and the attack group is difficult to approach to the central atom, in the thermodynamics and kinetics, they are both stable. Studies have said sulfur hexafluoride can be stably present in the atmosphere for thousands of years.

物理的性質

Colorless, odorless gas; density 6.41 g/L; about five times heavier than air; liquefies at -50.7°C (triple point); density of liquid 1.88 g/mL at -50.7°C; sublimes at -63.8°C; critical temperature 45.54°C; critical pressure 37.13 atm; critical volume 199 cm3/mol; slightly soluble in water; soluble in ethanol.

使用

Sulfur hexafluoride is used extensively as a gaseous dielectric in various kinds of electrical power equipment, such as switchgear, transformers, condensers, and circuit breakers. It has also been used as a dielectric at microwave frequencies and as an insulating medium for the power supplies of high-voltage machines.
Sulfur hexafluoride is also gaining use in nonelectrical applications, including blanketing of molten magnesium, leak detection, and plasma etching in the semiconductor industry. Sulfur hexafluoride also has some limited medical applications.

使用

Sulfur hexafluoride is used extensively as a gaseous dielectric in various kinds of electrical power equipment, such as switchgear, transformers, condensers, and circuit breakers. It has also been used as a dielectric at microwave frequencies and as an insulating medium for the power supplies of high-voltage machines.
Sulfur hexafluoride is also gaining use in nonelectrical applications, including blanketing of molten magnesium, leak detection, and plasma etching in the semiconductor industry. Sulfur hexafluoride also has some limited medical applications.

使用

Dielectric for high-voltage equipment

製造方法

Sulfur hexachloride may be prepared by reacting fluorine with sulfur or sulfur dioxide.

brand name

SonoVue (for the microbubble formulation) (Ausimont).

反応プロフィール

This substance undergoes chemical reactions only under relatively severe circumstances. They are resistant to ignition, although they may become flammable at very high temperatures. They may be resistant to oxidation reduction, except in the most severe conditions. These materials may be nontoxic. They can asphyxiate. Contact of very cold liquefied gas with water may result in vigorous or violent boiling of the product and extremely rapid vaporization due to the large temperature differences involved. If the water is hot, there is the possibility that a liquid "superheat" explosion may occur. Pressures may build to dangerous levels if liquid gas contacts water in a closed container [Handling Chemicals Safely 1980].

危険性

Asphyxiant.

健康ハザード

Vapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating, corrosive and/or toxic gases.

火災危険

Some may burn but none ignite readily. Containers may explode when heated. Ruptured cylinders may rocket.

材料の用途

Sulfur hexafluoride is noncorrosive to all metals. It may be partially decomposed if subjected to an electrical discharge. Some of the breakdown products are corrosive; this corrosion is enhanced by the presence of moisture or at high temperature. Sulfur hexafluoride decomposes very slightly in the presence of certain metals at temperatures in excess of 400°F (204°C); this effect is most pronounced with silicon and carbon steels. Such breakdown, presumably catalyzed by the metals, is only several tenths of 1 percent over 1 year. Decomposition at elevated temperatures does not occur with aluminum, copper, brass, and silver.
Most common gasket materials, including Teflon, neoprene, and natural rubber are suitable for sulfur hexafluoride service.

安全性プロファイル

This material is chemically inert in the pure state and is considered to be physiologcally inert as well. However, as it is ordinarily obtainable, it can contain variable quantities of the lowsulfur fluorides. Some of these are toxic, very reactive chemically, and corrosive in nature. These materials can hydrolyze on contact with water to yield hydrogen fluoride, which is highly toxic and very corrosive. In high concentrations and when pure it may act as a simple asphyxiant. Incompatible with disilane. Vigorous reaction with disilane. May explode. When heated to decomposition emits highly toxic fumes of Fand SOx.

職業ばく露

May contain highly toxic sulfur pentafluoride as an impurity. SF6 is used in various electric power applications as a gaseous dielectric or insulator. The most extensive use is in high-voltage transformers. SF6 is also used in waveguides, linear particle accelerators; Van de Graaff generators; chemically pumped continuous-wave lasers; transmission lines; and power distribution substations. Nonelectrical applications include use as a protective atmosphere for casting of magnesium alloys and use as a leak detector or in tracing moving air masses. Several sources note that vitreous substitution of SF6 in owl monkeys results in a greater ocular vascular permeability than that caused by saline. This implies that SF6 could have an important use in retinal surgery.

Physiological effects

Sulfur hexafluoride is completely nontoxic, and in fact has been used medically with humans in cases involving pneumoperitoneum, the introduction of gas into the abdominal cavity. It can act as a simple asphyxiant by displacing the amount of oxygen in the air necessary to support life.
Lower fluorides of sulfur, some of which are toxic, may be produced if sulfur hexafluoride is subjected to electrical discharge. Personnel must guard against the inhalation of the gas after electrical discharge.
ACGIH recommends a Threshold Limit Value-Time-Weighted Average (TLV-TWA) of 1000 ppm (5970 mg/m3) for sulfur hexafluoride. The TLV- TWA is the time-weighted average concentration for a normal 8-hour workday and a 40-hour workweek, to which nearly all workers may be repeatedly exposed, day after day, without adverse effect.
OSHA lists an 8-hour Time-Weighted Average-Permissible Exposure Limit (TWA-PEL) of 1000 ppm (6000 mg/m3) for sulfur hexafluoride. TWA-PEL is the exposure limit that shall not be exceeded by the 8-hour TWAin any 8-hour work shift of a 40-hour workweek.

貯蔵

All ofthe precautions necessary for the handling of any nonflammable gas must be taken.

輸送方法

UN1080 Sulfur hexafluoride, Hazard Class: 2.2; Labels: 2.2-Nonflammable compressed gas. Cylinders must be transported in a secure upright position, in a wellventilated 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

May contain impurities that cause it to hydrolyze on contact with water, forming corrosive and toxic hydrogen fluoride. Vigorous reaction with disilane.

廃棄物の処理

Return refillable compressed gas cylinders to supplier. Seal unused cylinders and return to suppliers.

化学的特性

Sulfur pentafluoride and sulfur tetrafluoride are classified by OSHA as highly hazardous chemicals under its Process Safety Management Standard and as toxic industrial chemicals on the basis of their highly toxic nature and production in large quantities (29 CFR 1910).

GRADES AVAILABLE

Sulfur hexafluoride is available for commercial and industrial use in various grades (minimum 99.8 mole percent) having much the same component proportions from one producer to another.

ヘキサフルオロ硫黄(VI) 上流と下流の製品情報

原材料

準備製品


ヘキサフルオロ硫黄(VI) 生産企業

Global( 95)Suppliers
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2551-62-4(ヘキサフルオロ硫黄(VI))キーワード:


  • 2551-62-4
  • Electronic Sulfur hexafluoride
  • Sulfur Hexafluoride(SF6) electronic grade
  • LEAK DETECTION STANDARD LD-1
  • sulfurfluoride(sf6)
  • sulfurhexafluoride,highpurity
  • SULPHUR HEXAFLUORIDE
  • SULFURYL HEXAFLUORIDE
  • SULFUR HEXAFLUORIDE
  • SULFUR HEXAFLOURIDE
  • SULFUR HEXAFLUORIDE, 99.75+%
  • Sulfur fluoride (SF6), (OC-6-11)-
  • sulfur hexafluoride cyl. with 4.75 kg (~net)
  • Sulphurhexafluoride2
  • SULFURHEXAFLORIDE
  • Sulfur hexafluoruides
  • Hexafluorosulfur(VI)
  • Sulfur(VI)hexafluoride
  • SF6 injecting reagent
  • Hexafluorosulphane
  • Sulphur hexafluoride 99%
  • (OC-6-11)-Sulfurfluoride
  • (oc-6-11)-sulfurfluoride(sf6
  • Elegas
  • Esaflon
  • Hexafluorure de soufre
  • hexafluoruredesoufre
  • hexafluoruredesoufre(french)
  • OC-6-11
  • Schwefelhcsafluorid
  • SF6
  • 硫黄(VI)フルオリド
  • ヘキサフルオロ硫黄(VI)
  • 硫黄(VI)ヘキサフルオリド
  • エレガス
  • ふっ化硫黄(VI)
  • 六ふっ化硫黄
  • ロクフッ化硫黄
  • 六フッ化イオウ
  • 6フッ化硫黄
  • 6フッ化硫黄(SF6) 
  • 地球温暖化物質(SF6)
  • 六フッ化硫黄、
  • 六弗化硫黄
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