중크롬산 칼륨
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중크롬산 칼륨 속성
- 녹는점
- 398 °C (lit.)
- 끓는 점
- 82 °C
- 벌크 밀도
- 1250kg/m3
- 밀도
- 7.14 g/mL at 25 °C(lit.)
- 인화점
- 50 °F
- 저장 조건
- Store at RT.
- 용해도
- H2O: 0.1 M @ 20 °C, 투명, 주황색
- 물리적 상태
- 가루
- 색상
- 오렌지 레드
- Specific Gravity
- 2.676
- 수소이온지수(pH)
- 3.5-5.0 (25℃, 0.1M in H2O)
- 수용성
- 125g/L(20℃)
- Merck
- 14,7627
- 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
- InChIKey
- KMUONIBRACKNSN-UHFFFAOYSA-N
- CAS 데이터베이스
- 7778-50-9(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
| 위험품 표기 | T,N,T+,O | ||
|---|---|---|---|
| 위험 카페고리 넘버 | 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53-52/53-20-48/20-23-51/53-22-36/37/38-27-20/21-23/24 | ||
| 안전지침서 | 53-45-60-61-36/37-23-26 | ||
| 유엔번호(UN No.) | UN 3086 6.1/PG 1 | ||
| WGK 독일 | 3 | ||
| RTECS 번호 | HX7680000 | ||
| TSCA | Yes | ||
| 위험 등급 | 5.1 | ||
| 포장분류 | III | ||
| HS 번호 | 28415000 | ||
| 유해 물질 데이터 | 7778-50-9(Hazardous Substances Data) | ||
| 독성 | LD50 orally in Rabbit: 90.5 mg/kg LD50 dermal Rat 1170 mg/kg | ||
| 기존화학 물질 | KE-29094 | ||
| 유해화학물질 필터링 | 99-1-506;06-5-10 | ||
| 중점관리물질 필터링 | 별표1-132 | ||
| 함량 및 규제정보 | 물질구분: 유독물질; 혼합물(제품)함량정보: 중크롬산 또는 그 염류 및 중크롬산 염류를 0.1% 이상 함유한 혼합물 |
중크롬산 칼륨 C화학적 특성, 용도, 생산
화학적 성질
Also known as potassium bichromate and red potassium chromate, K2Cr2O7 is poisonous,yellowish-red crystals with a metallic taste that is soluble in water,insoluble in alcohol,that melt at 396℃;and decompose at 500℃. Used as an oxidizing agent and analytical reagent,and in explosives, matches, and electroplating.용도
Potassium bichromate is also known as potassium dichromate, this bright orange crystal was made by the acidification of potassium chromate. It is toxic and an oxidant and is soluble in water but not in alcohol. In 1839 Mungo Ponton sensitized paper with a solution of potassium bichromate to print-out images in the sun. The most important use of potassium bichromate was used to make colloids sensitive to light for a variety of processes such as the photoglyphic engraving process, the carbon process, the gum bichromate process, and in the preparation of the gelatin relief used to make lead molds for the Woodburytype.정의
ChEBI: A potassium salt that is the dipotassium salt of dichromic acid.일반 설명
Orange red crystals. Denser than water and soluble in water. No distinctive odor. May severely irritate the eyes and respiratory tract. Avoid contact with organic materials. Noncombustible. Used in pyrotehnic displays with tungsten and iron.공기와 물의 반응
Soluble in water.반응 프로필
Potassium or sodium dichromate reacts explosively with hydrazine [Mellor 11:234. 1946-47]. A drop of anhydrous hydroxylamine on powdered potassium dichromate produces a violent explosion [Mellor 8:293. 1946-47].위험도
Toxic by ingestion and inhalation. Dan- gerous fire risk in contact with organic materials. Strong oxidizing agent.건강위험
Highly corrosive to skin and mucous membranes. If ingested, causes violent gastroenteritis, peripheral vascular collapse, vertigo, muscle cramps, coma, and (later) toxic nephritis with glycosuria. Allergic reactions may also occur.화재위험
Behavior in Fire: May decompose, generating oxygen. Supports the combustion of other materials.공업 용도
This material, K2Cr2O7, decomposes at 500°C.Bright yellowish-red crystals are soluble andpoisonous. Sometimes potassium chromate,K2Cr2O4, and the dichromate are utilized inceramics as coloring agents.Potassium dichromate is used in glass foraventurine effects. It is said that 20 or 21 partsto 100 parts sand will give a chrome aventurine.This glass is characterized by glittering metallicscales of chromium oxide. Potassiumdichromate is also used in glass to give a greencolor. However, it has been shown that it may cause considerable trouble by formation ofblack, chrome corundum crystals in the glass.Air-floated chromite is suggested to avoid thisproblem.
Potassium dichromate is used in glazes toproduce chrome-tin pinks, low-fire reds, greens,and purplish-red colors.
Safety Profile
Human poison by ingestion. An experimental poison by ingestion, intraperitoneal, intravenous, and subcutaneous routes. Human mutation data reported. An experimental teratogen. Other experimental reproductive effects. Flammable by chemical reaction. A powerful oxidzer. Explosive reaction with hydrazine. Reacts violently or ignites with H2SO4+ acetone, hydroxylamine, ethylene glycol (above 100℃). Forms pyrotechnic mixtures with boron + dion, iron (igmtes at 1090℃), tungsten (igmtes at 1700℃). Reacts with sulfuric acid to form the strong oxidant chromic acid. Used in photomechanical processing, chrome pigment production, and wool preservation methods. When heated to decomposition it emits toxic fumes of K2O. See also CHROMIUM COMPOUNDS.잠재적 노출
Potassium chromate is used in printing: photomechanical processing; chrome-pigment production; and wool preservative methods; to make dyes, pigments, inks and enamels; as an oxidizing agent; analytical reagent; in electroplating; explosives.운송 방법
UN1479 Oxidizing solid, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, Technical Name Required. UN3288 Toxic solids, inorganic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name RequiredPurification Methods
Crystallise it from water (g/mL) between 100o and 0o and dry it under vacuum at 156o. (Possible CARCINOGEN.)비 호환성
A powerful oxidizer. Violent reactions with combustibles, organics, powdered metals; or easily oxidizable substances. Contact with hydroxylamine, hydrazine causes explosion.중크롬산 칼륨 준비 용품 및 원자재
원자재
중크롬산나트륨
차아염소산나트륨
중크롬산나트륨
암피실린 무수산염
수산화칼륨
염화나트륨
코발트 (III) 산화물
크롬(6+) 트리산화물
Chrome iron ore
염소산칼륨
황산알루미늄
염화칼륨
준비 용품
3,4-Dinitrobenzoic acid
비닐 플루오르화물
2,4-디니트로벤조익산
광택이나는 BLUE R-250
N,N'-Bis- (1-naphthalenyl)-N,N'-bis-phenyl-(1,1'-biphenyl)-4,4'-diamine
알파Z우린 A
CHROMIUM POTASSIUM SULFATE
2-QUINOXALINECARBONYL CHLORIDE
2,4-BIS(DIMETHYLAMINO)PYRIMIDINE-6-CARBOXYLIC ACID
N,N'-Diphenylbenzidine
2-Bromopyridine-4-carboxylic acid
potassium dichromate-polyimide photopolymer
5-FLUORO-2H-3,1-BENZOXAZINE-2,4(1H)-DIONE
4,4-다이메틸-2-펜탄온
6-Chloropyridazine-3-carboxylic acid
구리크롬철광
산 청색 9 (디암모늄 염)
3,5-디메틸-4-이속사졸카르발데하이드
2-Amino-6-methoxybenzoic acid
메나디온
크롬산바륨
fluorescent whitening agent EFR
2-Bromo-4-pyridinecarboxaldehyde
2-데세날
2-Chloro-6-fluoroaniline
식용 적색 106호
칼륨 크롬산(III) 황산염 십이수화물
크롬산 아연
말레이미디
크롬산 칼륨
2,5-DINITROBENZOIC ACID
하르민
ABS/Cu-Ni electromagnetic shielding composites
1,4-나프토퀴논
이소길초산이소아밀
Chrom-tin-Pink Stannite Pigment
N,N'-비스(3-메틸페닐)-N,N'-다이페닐-(1,1'-바이페닐)-4,4'-다이아민
1,4-나프탈렌디카본산
4-술파모일벤조산
테트라옥시크롬산아연