이산화 텔루륨
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이산화 텔루륨 속성
- 녹는점
- 733 °C (lit.)
- 끓는 점
- 1245 °C
- 밀도
- 5.67 g/mL at 25 °C (lit.)
- 증기압
- 0Pa at 25℃
- 저장 조건
- no restrictions.
- 용해도
- insoluble in H2O; soluble in alkaline solutions, acid solutions
- 물리적 상태
- 가루
- 색상
- 흰색에서 약간 노란색
- Specific Gravity
- 5.8
- 수용성
- 불용성
- 최대 파장(λmax)
- 360nm(neat)(lit.)
- Merck
- 14,9123
- 노출 한도
- ACGIH: TWA 0.1 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 0.1 mg/m3
- 안정성
- 안정적인. 강산, 강산화제와 호환되지 않습니다.
- CAS 데이터베이스
- 7446-07-3(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
| 안전지침서 | 24/25 | ||
|---|---|---|---|
| 유엔번호(UN No.) | UN 3284 6.1/PG 3 | ||
| WGK 독일 | 2 | ||
| RTECS 번호 | WY2675000 | ||
| TSCA | Yes | ||
| 위험 등급 | 6.1(a) | ||
| 포장분류 | II | ||
| HS 번호 | 28112900 | ||
| 독성 | LD50 orally in Rabbit: > 2000 mg/kg | ||
| 기존화학 물질 | KE-33097 |
이산화 텔루륨 C화학적 특성, 용도, 생산
화학적 성질
Heavy, white, crystalline powder; odorless. Soluble in concentrated acids, alkalies; slightly soluble in dilute acids, water.
물리적 성질
White crystals; dimorphic; exists in tetragonal and orthorhombic forms; density 5.75 g/cm3 (tetragonal), 6.04 g/cm3 (orthorhombic); melts at 733°C forming a deep yellow liquid; vaporizes at 1,245°C; insoluble in water; soluble in acids and alkalies.용도
Tellurium dioxide is also used in devices which can convert light into sound (acousto-optic material). Glasses made of tellurium oxide have high refractive indices and transmit into mid-IR region. It is used to make glasses with special properties. It is useful in optical waveguides and optical fiber amplification.생산 방법
Tellurium dioxide in its orthorhombic form occurs in nature as mineral tellurite. It is mined from natural deposits. Also, tellurium dioxide is produced as an intermediate during recovery of tellurium metal from anode slimes of electrolytic copper refining (See Tellurium, Production). The dioxide also is prepared by treating tellurium metal with hot nitric acid to form 2TeO2?HNO3. The product then is heated to drive off nitric acid.일반 설명
Tellurium dioxide (TeO2) is a ceramic material that can be used as a semiconducting oxide. It has a wide band gap and high mobility as determined by density functional theory (DFT) calculations. In bulk quantity, it exists in two polymorphs which include tetragonal α-TeO2 and orthorhombic β-TeO2.Safety Profile
Poison by intratracheal route. An experimental teratogen. Experimental reproductive effects. When heated to decomposition it emits toxic fumes of Te. See also TELLURIUM COMPOUNDS.Purification Methods
Dissolve it in 5M NaOH, filter it and precipitate it by adding 10M HNO3 to the filtrate until the solution is acid to phenolphthalein. After decanting the supernatant, the precipitate is washed five times with distilled water, then dried for 24hours at 110o [Horner & Leonhard J Am Chem Soc 74 3694 1952].이산화 텔루륨 준비 용품 및 원자재
원자재
Tellurium tetrafluoride.
테트라아이오딘화 텔루륨(테트라요오드화 텔루르)
텔루르 염화물
dihydrogen trioxotellurate
TELLURIC ACID
질산
준비 용품
이산화 텔루륨 공급 업체
글로벌( 252)공급 업체
| 공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
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