실리콘 테트라플루오리드

실리콘 테트라플루오리드 속성

실리콘 테트라플루오리드 C화학적 특성, 용도, 생산

화학적 성질

Silicon tetrafluoride exhibits a very pungent odor. Silicon tetrachloride has a suffocating odor and is moisture sensitive.

물리적 성질

Colorless gas; very pungent odor; fumes heavily in moist air; density of the gas 4.69 g/L; heavier than air, density in air 3.5 (air = 1); sublimes at -95.7°C; solidifies at -90.2°C (under pressure); critical pressure 50atm; decomposes in water forming silicic acid and hydrofluoric acid.

용도

Manufacture of fluosilicic acid, intermediate in manufacture of pure silicon, to seal water out of oil wells during drilling.

제조 방법

Silicon tetrafluoride is prepared by heating silica with dilute hydrofluoric acid at high temperatures:
SiO₂ + 4HF → SiF₄ + 2H₂O
Also, the tetrafluoride may be obtained by heating the elements:
Si + 2F₂ → SiF₄.

일반 설명

A colorless, nonflammable, corrosive and toxic gas with a pungent odor similar to that of hydrochloric acid. Very toxic by inhalation. Vapor is heavier than air. Under prolonged exposure to heat the containers may rupture violently and rocket.

공기와 물의 반응

Fumes in air. Decomposed exothermically by water or moisture in the air to hydrofluoric acid and silicic acid [Merck 11th ed. 1989; Handling Chemicals Safely 1980 p. 821].

반응 프로필

When heated to decomposition SILICON TETRAFLUORIDE emits toxic fluoride fumes [Lewis, 3rd ed., 1993, p. 1138]. Reacts violently with alcohols to form HF. Attacks many metals in the presence of moisture. Reacts violently to explosively with lithium nitride [Porritt, L. J., Chem. Brit., 1979, 15, p. 282]. Mixtures with sodium are shock-sensitive explosives [Leleu, Cahiers, 1975, (79), p. 270].

위험도

Toxic by inhalation, strong irritant to mucous membranes.

건강위험

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.

화재위험

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.

Safety Profile

A poison. Moderately toxic by inhalation. A corrosive irritant to skin, eyes, and mucous membranes. When heated to decomposition it emits toxic fumes of F-. See also FLUORIDES and HYDROFLUORIC ACID

잠재적 노출

Silicon tetrafluoride is not used in industry but may be a discharge byproduct of certain processes, including ore refining and smelting operations. It has been used in the manufacture of silane and fluosilicic acid, and pure electronic silicon.

운송 방법

UN1859 Silicon tetrafluoride, Hazard Class: 2.3; Labels 2.3-Poisonous gas; 8-Corrosive material; Inhalation Hazard Zone B. 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.

비 호환성

Water and air reactive Fluorides form explosive gases on contact with strong acids, acid fumes, and sodium. Water and air reactive. Corrosive. Fumes in air. Decomposed exothermically by water, alcohols, or moisture in the air to hydrofluoric acid and silicic acid, forming flammable and potentially explosive hydrogen gas. Attacks many metals in the presence of moisture.

폐기물 처리

For laboratory quantities, transfer into an evaporating dish containing sodium bicarbonate, spray with ammonia (6M NH4OH)/6 M-ammonium hydroxide/while stirring and then spread with crushed ice. Continue spraying with ammonia until the smoke of ammonium chloride partly subsides and add iced water while stirring. Neutralize and slowly transfer the mixture into a drain with running water.

실리콘 테트라플루오리드 준비 용품 및 원자재

원자재

준비 용품

실리콘 테트라플루오리드 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Shanghai Daken Advanced Materials Co.,Ltd	+86-371-66670886	info@dakenam.com	China	15371	58
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22968	58
BEYOND INDUSTRIES (CHINA) LIMITED	+86-21-52699951; +8613917686115	sales@beyondindustriesgroup.com	China	699	58
Hefei TNJ Chemical Industry Co.,Ltd.	0551-65418671	sales@tnjchem.com	China	34572	58
CD Chemical Group Limited	+8615986615575	info@codchem.com	China	20356	58
Shaanxi Didu New Materials Co. Ltd	+86-89586680 +86-13289823923	1026@dideu.com	China	9448	58
Henan Allgreen Chemical Co.,LTD	+86-37155567971 +86-13633837469	info@allgreenchem.com	China	5986	58
Mainchem Co., Ltd.	+86-0592-6210733	sale@mainchem.com	China	32360	55
PERIC Special Gases Co., Ltd.	0310-7182720-613 15620672519	zhaoqingwei@pericsg.com	China	40	58

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