브롬화칼슘
브롬화칼슘 · CaBr2 · Brocal · C13189 · Dibromocalcium · CALCIUM BROMIDE · calciumdibromide · CALCIUM BROMIDE 52%
식별자 및 물리적 특성
| CAS No. | 7789-41-5 |
|---|---|
| 분자식 | Br2Ca |
| 평균 분자량 | 199.89 g/mol |
| 단동위원소 질량 | 197.79927 g/mol |
| SMILES | [Br-].[Br-].[Ca+2] |
| InChIKey | WGEFECGEFUFIQW-UHFFFAOYSA-L |
| PubChem CID | 24608 |
| 현지명 | 브롬화칼슘 |
화학 및 물리적 성질
| 극성 표면적 | 0 |
|---|---|
| 수소 결합 공여자 수 | 0 |
| 수소 결합 수용자 수 | 2 |
| 회전 가능 결합 수 | 0 |
| 무거운 원자 수 | 3 |
| 형식 전하 | 0 |
| 복잡도 | 2.8 |
| 녹는점 | 730°C |
| 끓는 점 | 806-812°C |
| 밀도 | 3.353 g/mL at 25 °C (lit.) |
| 증기압 | 0Pa at 25℃ |
| 인화점 | 806-812°C |
| 용해도 | soluble in ethanol, acetone |
| 물리적 상태 | 염주 |
| 색상 | 흰색에서 황백색까지 |
| 비중 | 3.353 |
| 냄새 | 세분화된. 또는 마름모꼴 결정, 무취, 날카로운 식염수 맛 |
| 용해도 | 물, 메탄올, 에탄올, 아세톤에 용해됩니다. 디옥산, 클로로포름 및 에테르에 불용성. |
| Merck | 14,1654 |
| 안정성 | 흡습성 |
| InChI | 1S/2BrH.Ca/h2*1H/q+2/p-2 |
| InChIKey | WGEFECGEFUFIQW-UHFFFAOYSA-L |
| SMILES | Br[Ca]Br |
| NIST | Calcium dibromide(7789-41-5) |
| EPA | Calcium bromide (CaBr2) (7789-41-5) |
화학적 성질
Calciumbromide, CaBr2, is a colorless crystalline solid with a melting point of 765°C. It is deliquescent and is soluble in water and absolute alcohol. Calcium bromide is used in medicine. Calcium bromide(hydrated), CaBr2·3H20, has a meiting point of 80.5℃.
안전 및 규제
| 수질 위해 등급(WGK) | 2 |
|---|---|
| TSCA 등재 상태 | TSCA listed |
| RTECS 번호 | EV9328000 |
| 관세 코드 | 2827590000 |
| 위험 문구(R) | 38-41 |
| 위험 표시 | Xi |
| 안전 문구(S) | 22-24/25-39-26 |
| 기존화학 물질 | KE-04485 |
| 위험 등급 | Eye Dam. 1 |
| 저장 분류 | 11 - Combustible Solids |
| 유해 물질 데이터 | 7789-41-5(Hazardous Substances Data) |
용도
개요
Calcium bromide has the chemical formula CaBr2. It was first prepared by Pfeiffer, Klossmann and Angern in 1924. It is a deliquescent salt that has the form of colorless hexagonal crystals that are soluble in water and absolute alcohol. Its molecular weight is 199.90 g/ mol for the anhydride. When strongly heated in air, calcium bromide will produce CaO (lime) and Br2. It is generally obtained as the dihydrate, CaBr2·2H2O, in the form of a white crystalline powder. A hexahydrate, CaBr2·6H2O, is also known. Anhydrous calcium bromide is obtained by dehydration (250°C, vacuum) of the dihydrate CaBr2·2H2O. On contact with hot surfaces or flames, CaBr2 decomposes forming bromine as a toxic and corrosive fume. It also reacts with strong acids to produce corrosive fumes of bromine. In its solid anhydrous state, it is a white powder. CaBr2 can be found in drilling muds, neuroses medication, freezing mixtures, food preservatives, photography and fire retardants. The anhydride has a melting point of 730°C and a boiling point of 810°C where it decomposes. Its density is 3.41 g/cm3. It is moderately soluble in water at 142 g/100 ml of water.
용도
Made by the action of hydrobromic acid on calcium oxide and crystallization. The white granular crystals are soluble in water. Calcium bromide was used in making collodion emulsions, particularly for dye-sensitized plates.
제조 및 합성 방법
제조 방법
CaBr2·2H2O has a melting point of 38°C where it dissolves in its own waters of hydration. Its density is 2.290 g/cm3. It can be prepared by reaction in solution with HBr on the carbonate: CaCO3 (solid)＋HBr (liq)→CaBr2 (liq)＋ CO2 (gas) An improved method for producing calcium bromide has been developed by reacting hydrogen bromide with calcium hydroxide in the presence of water.