Tellurous acid

Tellurous acid C화학적 특성, 용도, 생산

개요

H2TeO3 has been synthesized as a solid but it is not well characterized. If tellurium dioxide, TeO2, is added to water, tellurous acid does not easily form, but it can be made other ways. Its CAS number is 10049-23-7.
Tellurous acid can be formed from the chlorides. Two chlorides are known, the dichloride, TeCl2, and the tetrachloride, TeCl4. They are both obtained by passing chlorine over tellurium, the product being separated by distillation (the tetrachloride is the less volatile). The dichloride is an amorphous, readily fusible, almost black solid. It is decomposed by water with formation of tellurium and tellurous acid:
2TeCl2+ 3H2O ? Te+H2TeO3+ 4HCl
However, pure tellurous acid, H2TeO3, can be obtained when the tetrachloride is decomposed by water, or on dissolving tellurium in nitric acid and pouring the solution into water. It is a colorless solid and behaves as a dibasic acid. The alkali tellurites are soluble in water. They also gives rise to super acid salts, such as KHTeO3·H2TeO3.

화학적 성질

White, crystalline powder. Soluble in dilute acids, alkalies; slightly soluble in water, alcohol.

위험도

As for tellurium.

Tellurous acid 준비 용품 및 원자재

원자재

준비 용품

Tellurous acid 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Beijing Hengye Zhongyuan Chemical Co., Ltd	--	13552281129@163.com	China	6168	64
Tianjin white Chemical Co.	--	bshg@tjbschem.com	China	2009	61

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