크롬(6+) 트리산화물
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크롬(6+) 트리산화물 속성
- 녹는점
- 196 °C (dec.)(lit.)
- 끓는 점
- 330 °C
- 밀도
- 2.7
- 증기압
- 0Pa at 25℃
- 인화점
- 250°C
- 저장 조건
- Store below +30°C.
- 용해도
- 1.667g/L
- 물리적 상태
- 거대다공성의
- 산도 계수 (pKa)
- -0.61[at 20 ℃]
- Specific Gravity
- 2.7
- 색상
- 붉은 보라색
- 수소이온지수(pH)
- <1 (100g/l, H2O, 20℃)
- 수용성
- 용해성이 높다
- 어는점
- 170~172℃
- 감도
- Hygroscopic
- Merck
- 14,2235
- 노출 한도
- ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin)
OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
- 안정성
- 안정적인. 강한 산화제. 폭력적이고 종종 폭발적인 방식으로 대부분의 유기 물질과 반응합니다. 수분에 민감합니다.
- InChIKey
- WGLPBDUCMAPZCE-UHFFFAOYSA-N
- CAS 데이터베이스
- 1333-82-0(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
위험품 표기 | O,T+,N,T | ||
---|---|---|---|
위험 카페고리 넘버 | 45-46-9-24/25-26-35-42/43-48/23-50/53-62-8 | ||
안전지침서 | 53-45-60-61-36/37/39-28-26-22 | ||
OEB | E | ||
OEL | TWA: 0.0002 mg/m3 (8-hours) | ||
유엔번호(UN No.) | UN 1463 5.1/PG 2 | ||
WGK 독일 | 3 | ||
RTECS 번호 | GB6650000 | ||
TSCA | Yes | ||
위험 등급 | 5.1 | ||
포장분류 | II | ||
HS 번호 | 28191000 | ||
유해 물질 데이터 | 1333-82-0(Hazardous Substances Data) | ||
독성 | LD50 oral (rat) 80 mg/kg PEL (OSHA) 0.1 mg (CrO3)/m3 (ceiling) TLV-TWA (ACGIH) 0.05 mg (Cr)/m3 |
||
IDLA | 15 mg Cr(VI)/m3 | ||
기존화학 물질 | KE-06020 | ||
유해화학물질 필터링 | 97-1-94;06-5-10 | ||
중점관리물질 필터링 | 별표1-111 | ||
함량 및 규제정보 | 물질구분: 제한물질; 혼합물(제품)함량정보: 크로뮴(6+)화합물 및 이를 0.1% 이상 함유한 혼합물 |
크롬(6+) 트리산화물 C화학적 특성, 용도, 생산
개요
Chromium hydroxide (Cr2O(OH)4) is a bright bluish-green pigment prepared by the calcinations of bichromate with boric acid at 500°C. The mass during cooling is hydrolyzed with water, which yields the hydrate.화학적 성질
Chromium trioxide is a dark-red crystalline substance. It is odorless물리적 성질
Dark-red crystals, flakes or granular powder; bipyramidal prismatic system; density 2.70 g/cm3; melts at 197°C; decomposes on further heating; highly soluble in water, 61.7 g and 67 g/100 mL at 0°C and 100°C, respectively; soluble in sulfuric and nitric acids.용도
Chromium(VI) oxide is widely used in chromium electroplating, and as protective coatings in corrosion/oxidation resistance of metals. It is also employed in CDs and DVDs. It is useful as an oxidant in Jones oxidation in acetic acid or acetone. It is used in the oxidation of primary alcohols into carboxylic acids, and secondary alcohols into ketones. With phosphoric acid, it is used as a stripping agent for anodic coatings of all types and in the production of syntheric rubies.정의
chromium trioxide: A redcompound, CrO3; rhombic; r.d. 2.70;m.p. 196°C. It can be made by carefuladdition of concentrated sulphuricacid to an ice-cooled concentratedaqueous solution of sodium dichromatewith stirring. The mixture isthen filtered through sintered glass,washed with nitric acid, then dried at120°C in a desiccator.Chromium(VI) oxide is an extremelypowerful oxidizing agent,especially to organic matter; it immediatelyinflames ethanol. It is anacidic oxide and dissolves in water toform ‘chromic acid’, a powerful oxidizingagent and cleansing fluid forglassware. At 400°C, chromium(VI)oxide loses oxygen to givechromium(III) oxide.
제조 방법
Chromium(VI) oxide is prepared by heating sodium dichromate dihydrate with a slight excess of sulfuric acid in a steel tank or cast iron container: Na2Cr2O7 + 2H2SO4 → 2CrO3 + 2NaHSO4 + H2O The temperature of the mixture is kept above the melting point of chromium(VI) oxide to evaporate water and separate the top layer of sodium bisulfate from the molten chromium(VI) oxide at the bottom. Temperature control and duration of heating is very crucial in the process. Temperatures over 197°C (melting point), or allowing the molten mass to stand for a longer time, may result in decomposition of the product.일반 설명
Chromium(VI) oxide (CrO3) is a hexavalent chromium that is majorly used as an oxidizing agent. It oxidizes the C-H bonds in the aromatic rings to form benzoic acid from alkyl benzene. It can be prepared by adding concentrated sulphuric acid in potassium dichromate.공기와 물의 반응
Deliquescent. Water soluble, giving acidic solutions.반응 프로필
CHROMIUM TRIOXIDE is a powerful oxidizing agent. Can react violently upon contact with reducing reagents, including organic matter, leading to ignition or explosion. Dangerously reactive with acetone, alcohols, alkali metals (sodium, potassium), ammonia, arsenic, dimethylformamide, hydrogen sulfide, phosphorus, peroxyformic acid, pyridine, selenium, sulfur, and many other chemicals [Sax, 9th ed., 1996, p. 852]. Noncombustible but can accelerate the burning of combustible materials. Sufficient heat may be generated from the reaction with combustible materials to ignite the mass. Aqueous solutions corrode many metals rapidly. Often mixed with sulfuric acid to make "cleaning solution" for glass. Used cleaning solution in closed bottles may explode due to the build up of gaseous carbon dioxide arising from oxidation of organic impurities [Bryson, W. R., Chem. Brit., 1975, 11, p. 377].건강위험
Chromium(VI) oxide and other chromium(VI) salts are moderately toxic substances by ingestion; 1 to 15 g may be a fatal dose in humans. Ingestion of nonlethal doses of these compounds can cause stomach, liver, and kidney damage; symptoms may include clammy, cyanotic skin, sore throat, gastric burning, vomiting, and diarrhea. Chromic acid is irritating to the skin, and prolonged contact can cause ulceration. Inhalation of chromate dust or chromic acid mist can result in severe irritation of the nose, throat, bronchial tubes, and lungs and may cause coughing, labored breathing, and swelling of the larynx. Eye contact with chromium trioxide and its solutions can cause severe burns and possible loss of vision.Occupational exposure to chromium(VI) compounds has been related to an increased risk of lung cancer. Several hexavalent compounds of chromium, including chromium trioxide, are listed in IARC Group 1 ("carcinogenic to humans") and are classified as "select carcinogens" under the criteria of the OSHA Laboratory Standard. Long-term exposure to chromium trioxide or chromium(VI) salts may cause ulceration of the respiratory system and skin. Exposure to chromium trioxide by inhalation or skin contact may lead to sensitization. Chromium trioxide has exhibited teratogenic activity in animal tests.
화재위험
These substances will accelerate burning when involved in a fire. May explode from heat or contamination. Some may burn rapidly. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.인화성 및 폭발성
Chromium(VI) oxide is not combustible but is a strong oxidizing agent and can accelerate the burning rate of combustible materials. Contact with easily oxidized organic or other combustible materials (including paper and oil) may result in ignition, violent combustion, or explosion. The use of dry chemical, carbon dioxide, Halon, or water spray extinguishers is recommended for fires involving chromium (VI) compounds.잠재적 노출
Chromium trioxide is used in plating and metal treatment, as a corrosion inhibitor; and as an oxidant; in aluminum anodizing, dye; ink, and paint manufacturing, tanning, engraving; and photography.저장
Chromium trioxide should be handled in a fume hood to avoid the inhalation of dust, and impermeable gloves should be worn at all times to prevent skin contact. The practice of using chromate solutions to clean glassware should be avoided. Chromium trioxide should be stored in areas separated from readily oxidized materials.운송 방법
UN1463 (anhydrous), Chromium trioxide, anhydrous, Chromium trioxide, anhydrous, Hazard Class: 5.1; Labels: 5.1-Oxidizer, 6.1-Poisonous materials, 8-Corrosive material. UN1755 (solution), Hazard class: 8; Labels: 8-Corrosive material.Purification Methods
It separates when potassium or sodium dichromate are dissolved in conc H2SO4. Dry it in a vacuum desiccator over NaOH pellets. It is a hygroscopic, powerful oxidant and can ignite with organic compounds. It is a skin and pulmonary IRRITANT. [Keyes et al. Industrial Chemicals (Lowenheim & Moran eds.) 4th edn J. Wiley pp 270-274 1975.] CANCER SUSPECT.비 호환성
Chromium trioxide is a strong oxidizer. The solution in water is a strong acid. Reacts violently with bases and is corrosive. Contact with reducing agents; fuels, organic chemicals, flammable and combustible materials, causing fire and explosion hazard. This chemical decomposes above 250C to chromic oxide and oxygen with increased fire hazard. Attacks metals in the presence of moisture.폐기물 처리
Reduce to Cr(III). If material cannot be recovered and recycled, dispose of sludge in a chemical waste landfill.크롬(6+) 트리산화물 준비 용품 및 원자재
원자재
준비 용품
2-Amino-6-nitropyridine
5-Nitropyridine-2-carboxylic acid
1-인다논
이산화 크롬
High temperature shift calalyst
CITRONELLIC ACID
Flutoprazepam
adhesive J-22H
METHYL 3-METHYLTHIOPHENE-2-CARBOXYLATE
Methyl 3-formylbenzoate
6-NITROPYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER
carbinol synthesis catalyst
무렉시드
납 실리코크로메이트
(R)-(+)-2-테트라히드로푸로산
6-NITROPYRIDINE-2-CARBOXAMIDE
메나디온
디페닐아세탈데하이드
6-NITROPYRIDINE-2-CARBOXYLIC ACID
Norandrostenedione
2,5-디브로모벤즈알데히드
황산수소나트륨
6-NITROPYRIDINE-2-CARBONYL CHLORIDE
Deprodone propionate
2,7- 디 브로 모 -9- 플루오 레논
페난트렌퀴논
코르티존
QUAZEPAM
ALLOXAN MONOHYDRATE
4-클로로-부티랄데하이드
시아노아세틸렌
크롬산 암모늄
3-메틸티오펜-2-카르복사미드
크롬산 칼슘
1-(3 5-DIMETHOXYPHENYL)HEPTAN-1-ONE 96
프로피오락산
7-Quinolinecarboxylic acid
3-Methyl-2-thiophenecarboxylic acid
질산크로늄
다이크로뮴산 암모늄
크롬(6+) 트리산화물 공급 업체
글로벌( 410)공급 업체
공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
---|---|---|---|---|---|
Hebei Mojin Biotechnology Co., Ltd | +8613288715578 |
sales@hbmojin.com | China | 12450 | 58 |
Hebei Guanlang Biotechnology Co,.LTD | +8619930503252 |
daisy@crovellbio.com | China | 5828 | 58 |
Henan Bao Enluo International TradeCo.,LTD | +86-17331933971 +86-17331933971 |
deasea125996@gmail.com | China | 2503 | 58 |
Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 |
info@tianfuchem.com | China | 21668 | 55 |
Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418679 +86-18949832763 |
info@tnjchem.com | China | 2989 | 55 |
career henan chemical co | +86-0371-86658258 +8613203830695 |
sales@coreychem.com | China | 29894 | 58 |
Hubei Jusheng Technology Co.,Ltd. | 18871490254 |
linda@hubeijusheng.com | CHINA | 28180 | 58 |
Hebei Guanlang Biotechnology Co., Ltd. | +86-19930503282 |
alice@crovellbio.com | China | 8822 | 58 |
Xiamen AmoyChem Co., Ltd | +86-592-6051114 +8618959220845 |
sales@amoychem.com | China | 6387 | 58 |
Hubei xin bonus chemical co. LTD | 86-13657291602 |
linda@hubeijusheng.com | CHINA | 22968 | 58 |