브로민화 칼륨

브로민화 칼륨 속성

브로민화 칼륨 MSDS

Potassium bromide

브로민화 칼륨 C화학적 특성, 용도, 생산

물성

성상: 고체, 색상: 무색 또는 흰색 계통, 냄새: 무취, pH: 5~8(5w/v% sol, 25℃), 녹는점/어는점: 734℃, 끓는점: 1435℃, 증기압: 1mmHg(795℃), 용해도: 66.7g/100mL(25℃), 비중: 2.75(20℃), 분자량: 119.00.

용도

주요 용도로는 적외흡수 스펙트럼 측정용분말, 에틸렌 제조용, 비누, 사진약, 브롬산칼륨원료, 광학기기의 프리즘, 연구개발(시약용) 등에 사용된다.

화학적 성질

Potassium bromide is a white or colourless crystalline solid with a pungent strong bitter and saline taste, slightly hygroscopic and soluble in water and very slightly soluble in ethanol and ether; cubic; r.d. 2.75; m.p. 734°C; b.p. 1435°C. Potassium bromide maybe prepared by the action of bromine on hot potassium hydroxide solutionor by the action of iron(III) bromideor hydrogen bromide on potassium carbonate solution. It is used widely in the photographic industry and is also used as a sedative. Because of itsrange of transparency to infrared radiation,KBr is used both as a matrix for solid samples and as a prism materialin infrared spectroscopy.

용도

Potassium bromide was used as a secondary halide in combination with an iodide in the paper negative processes, the albumen on glass process, and the wet collodion processes. When silver bromide gelatin emulsion was invented, potassium bromide was the primary halide. It was also used in combination with either bichloride of mercury, copper sulfate, or potassium ferricyanide in photographic bleaches and as a restrainer in alkaline developers used for gelatin plates and developing-out papers.

주요 응용

Potassium bromide is widely used in optics because KBr has a low refractive index and a wide spectral range into the infrared with nearly no absorption. As a result, KBr is widely used as infrared optical windows, as infrared beamsplitters, and as substrates for interferometers. Commonly KBr is used in transmission infrared spectroscopy as a media for powder samples. The KBr and powder are ground together and pressed, using a die, into a thin disc under vacuum. The disc suspends the sample without contributing to the transmitted signal. Potassium bromide has also been used in synthesis, commonly as a source of bromide ions. For example, double displacement of KBr and bismuth nitrate yielded nanosheets of bismuth oxybromide. Solutions of KBr have also been found to be useful shape-control agents or crystal-habit modifiers in formation of metal nanocrystals, including palladium nanorods and bimetallic platinum-paladium nanocrystals. KBr is a common source of bromide ions used as nucleophiles in organic chemistry.

제조 방법

Potassium bromide was produced by the action of bromine on hot potassium hydroxide solution or Reacting elemental bromine with potassium hydroxide or potassium iodide will produce the potassium bromide salt:
KOH + Br2 → KBr + HOBr
KI + Br2 → KBr + I2
The reaction of bromine with potassium carbonate and urea is the basis of the process. The first step of the process involves the addition of K2SO4 to the potassium carbonate solution, followed by heating to 80 °C. After the lead-containing precipitate is removed by filtration, the bromine and urea are added, and the temperature and pH are adjusted to 30 °C and 6.0-6.5, respectively. Potassium bromide is recovered by recrystallization after reduction of volume of the reacting solution by evaporation. The sulfate can be removed from the solution by addition of BaBr2.

정의

ChEBI: Potassium bromide is a metal bromide salt with a K(+) counterion. It is used in the manufacture of photographic film, developer, film thickener, toner and color photo bleach.

일반 설명

Potassium bromide is a white salt that crystallizes in the cubic rock salt structure, like sodium chloride. KBr is hygroscopic, deliquescent, highly soluble in water, and soluble in some polar organic solvents like glycerol, ethylene glycol, liquid ammonia, and hot ethanol, but insoluble in acetone. Aqueous solutions are neutral (pH about 7). When dissolved, KBr dissociates completely into its ions, making it a useful source of bromine ions in double displacement reactions or salt metathesis reactions. For example, this property was used in the production photographic films of silver bromide: KBr was reacted with silver nitrate to precipitate silver bromide, a salt that decomposes on exposure to light.

공기와 물의 반응

Water soluble.

반응 프로필

Potassium bromide is not in generally strongly reactive. A weak reducing agent, incompatible with oxidizing agents. Also incompatible with salts of mercury and silver. Violent reactions occur with bromine trifluoride. May react with nitrous ether spirit, many alkaloidal salts and starch. May also react with acids . Reacts with concentrated sulfuric acid to generate fumes of hydrogen bromide.

위험도

Toxic by ingestion and inhalation

화재위험

Flash point data for Potassium bromide are not available; however, Potassium bromide is probably nonflammable.

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. Large doses can cause central nervous system depression. Prolonged inhalation may cause skin eruptions. Mutation data reported. Violent reaction with BrF3. When heated to decomposition it emits toxic fumes of K2O and Br-. See also BROMIDES.

Purification Methods

Crystallise the bromide from distilled water (1mL/g) between 100o and 0o. Wash it with 95% EtOH, followed by Et2O. Dry it in air, then heat it at 115o for 1hour, pulverize it, then heat it in a vacuum oven at 130o for 4hours. It has also been crystallised from aqueous30% EtOH, or EtOH, and dried over P2O5 under vacuum before heating in an oven.

브로민화 칼륨 준비 용품 및 원자재

원자재

준비 용품

브로민화 칼륨 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hebei Zhanyao Biotechnology Co. Ltd	15369953316 +8615369953316	admin@zhanyaobio.com	China	2136	58
Aladdin Scientific	+1-+1(833)-552-7181	sales@aladdinsci.com	United States	57511	58
Aladdin Scientific	+1-+1(833)-552-7181	sales@aladdinsci.com	United States	52927	58
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12470	58
Hebei Yanxi Chemical Co., Ltd.	+8617531190177	peter@yan-xi.com	China	6011	58
Hebei Jingbo New Material Technology Co., Ltd	+8619931165850	hbjbtech@163.com	China	1000	58
Wuhan Ruichi Technology Co., Ltd	+8613545065237	admin@whrchem.com	China	162	58
Shandong Juchuang Chemical Co., LTD	+undefined15030412209	admin@juchuangchem.com	China	387	58
Hebei Saisier Technology Co., LTD	+86-18400010335 +86-18034520335	admin@hbsaisier.cn	China	971	58
Ouhuang Engineering Materials (Hubei) Co., Ltd	+8617702722807	admin@hbouhuang.com	China	3001	58

브로민화 칼륨 관련 검색: