메틸렌디브로마이드

메틸렌디브로마이드 속성

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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메틸렌디브로마이드 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Zouping mingyuan import & export trading co., ltd	+86-0543-2240078 +8618364991597	myzhao793@163.com	China	994	58
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12468	58
Hebei Yanxi Chemical Co., Ltd.	+8617531190177	peter@yan-xi.com	China	6011	58
Nanjing Deda New Material Technology Co., Ltd	+8613223293093	bella@njdeda.com	China	82	58
Henan Fengda Chemical Co., Ltd	+86-371-86557731 +86-13613820652	info@fdachem.com	China	18219	58
Hunan aslsen technology co.,ltd	+86-19118960954 +86-19313031929	aslsd@aslsen.com	China	128	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21688	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	sales@coreychem.com	China	29914	58
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58

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