메틸렌디브로마이드

메틸렌디브로마이드
메틸렌디브로마이드 구조식 이미지
카스 번호:
74-95-3
한글명:
메틸렌디브로마이드
동의어(한글):
다이브로모메탄;디브로모메탄;메틸렌디브로마이드;브로민화메틸렌(브롬화메틸렌);브롬화메틸렌;브로민화메틸렌(브롬화메틸렌);다이브로모메테인
상품명:
Dibromomethane
동의어(영문):
DBM;CH2Br2;METHYLENE BROMIDE;1,1-dibroMoMethane;Dibrommethan;DIBROMOMETHANE;dibromo-methan;methane,dibromo;Methane,dibromo-;Dibromomethane >
CBNumber:
CB7854206
분자식:
CH2Br2
포뮬러 무게:
173.83
MOL 파일:
74-95-3.mol

메틸렌디브로마이드 속성

녹는점
-52 °C
끓는 점
96-98 °C(lit.)
밀도
2.477 g/mL at 25 °C(lit.)
증기 밀도
6.05 (vs air)
증기압
34.9 mm Hg ( 20 °C)
굴절률
n20/D 1.541(lit.)
인화점
96-98°C
저장 조건
Store below +30°C.
용해도
11.7g/l
물리적 상태
Liquid
색상
Clear colorless to slightly brown
수용성
0.1 g/100 mL (20 ºC)
Merck
14,6061
BRN
969143
안정성
Stable. Incompatible with strong oxidizing agents, aluminium, magnesium. Reacts violently with potassium.
CAS 데이터베이스
74-95-3(CAS DataBase Reference)
NIST
Methane, dibromo-(74-95-3)
EPA
Dibromomethane (74-95-3)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 Xn,T,F
위험 카페고리 넘버 20-52/53-39/23/24/25-23/24/25-11
안전지침서 24-61-45-36/37-16-7
유엔번호(UN No.) UN 2664 6.1/PG 3
WGK 독일 2
RTECS 번호 PA7350000
TSCA Yes
HS 번호 2903 39 15
위험 등급 6.1
포장분류 III
유해 물질 데이터 74-95-3(Hazardous Substances Data)
독성 LD50 orally in Rabbit: 108 mg/kg LD50 dermal Rabbit > 4000 mg/kg
기존화학 물질 KE-09938
그림문자(GHS): GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
신호 어: Warning
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H412 장기적 영향에 의해 수생생물에 유해함 수생 환경유해성 물질 - 만성 구분 3 P273, P501
예방조치문구:
P273 환경으로 배출하지 마시오.
P501 ...에 내용물 / 용기를 폐기 하시오.
NFPA 704
1
2 0

메틸렌디브로마이드 C화학적 특성, 용도, 생산

화학적 성질

colourless liquid

용도

Dibromomethane is used as solvent in organic synthesis. It acts as an intermediate in the manufacture of specialty chemicals, agrochemicals and pharmaceuticals. It is useful as extractant and utilized for the determination of 5-nitroimidazoles (5-NDZ) in environmental waters. It is involved in the convertion of catechols to their methylenedioxy derivatives.

정의

ChEBI: A member of the class of bromomethanes that is methane substituted by two bromo groups. It is produced by marine algae.

일반 설명

A colorless liquid with a pleasant odor. Insoluble in water and denser than water. May be toxic by ingestion. Used as a solvent and as a motor fuel.

공기와 물의 반응

Insoluble in water.

반응 프로필

Halogenated aliphatic compounds, such as Dibromomethane, are moderately or very reactive. Reactivity generally decreases with increased degree of substitution of halogen for hydrogen atoms. Low molecular weight haloalkanes are highly flammable and can react with some metals to form dangerous products. Materials in this group are incompatible with strong oxidizing and reducing agents. Also, they are incompatible with many amines, nitrides, azo/diazo compounds, alkali metals (potassium), and epoxides.

건강위험

INHALATION: Anesthetic effects, nausea and drunkenness. CONTACT WITH SKIN AND EYES: Skin irritation of eyes and nose.

화재위험

Special Hazards of Combustion Products: Dissociation products generated in a fire may be irritating or toxic.

Toxicology

A poison. Moderately toxic by subcutaneous route. Mdly toxic by inhalation. Mutation data reported. mxtures with potassium explode on light impact. When heated to decomposition it emits toxic fumes of Br-. See also BROMIDES

위험도

In laboratory studies, animals experienced CNS depression at 2400-2800 ppm and liver and kidney damage after repeated exposures to 1000 ppm. Dichloromethane rarely causes hepatotoxicity unless exposure is extremely heavy or agent ingested. If left on clothes, it may cause reddening of skin; may have effects on the nervous system and blood, causing impaired functions, carboxyhemoglobinemia, and lowering of consciousness; chronic exposure may cause liver and kidney effects; an irritant; harmful by inhalation; a simple asphyxiant; may cause blood disorders, cardiac irregularities, and CNS depression;

Synthesis

Dibromomethane is synthesized commercially from dichloromethane via bromochloromethane:
6 CH2Cl2  + 3 Br2  + 2 Al  →  6 CH2BrCl  +  2 AlCl3
CH2Cl2  + HBr  →  CH2BrCl  +  HCl
The latter route requires aluminium trichloride as a catalyst. The bromochloromethane product from either reaction can further react in a similar manner:
6 CH2BrCl  + 3 Br2  + 2 Al  →  6 CH2Br2  +  2 AlCl3
CH2BrCl  + HBr  →  CH2Br2  +  HCl
In the laboratory, it is synthesized from bromoform:
CHBr3 + Na3AsO3 + NaOH → CH2Br2 + Na3AsO4 + NaBr
using sodium arsenite and sodium hydroxide.
Another way is to synthesize it from diiodomethane and bromine. 

잠재적 노출

Methylene bromide is used as a solvent and as a chemical intermediate.

운송 방법

UN2664 Dibromomethane, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

비 호환성

Mixture with potassium forms a shocksensitive explosive. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, sodium amide, strong acids, strong bases, alkaline earth metals, aluminum, magnesium. The substance decomposes on contact with hot surfaces producing hydrogen bromide

폐기물 처리

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal

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