二溴甲烷
二溴甲烷用途
用作溶剂,也用于有机合成
【用途二】
用作有机合成原料,可作溶剂、制冷剂、阻燃剂和抗爆剂组分
【用途三】
二溴甲烷是制备杀菌剂腈菌唑和咪菌唑的原料。
【用途四】
有机合成原料。可作溶剂、致冷剂、阻燃剂和抗爆剂的组分;在医药工业上用作消毒剂和镇痛剂。还用于农药腈菌唑和其他有机合成等。
二溴甲烷名称
[ CAS 号 ]:
74-95-3
[ 中文名 ]:
二溴甲烷
[ 英文名 ]:
Dibromomethane
[中文别名 ]:
[英文别名 ]:
- Dibromomethane
- Methylenbromid
- DBM
- dibromo-methane
- Dibrommethan
- Methylene Bromide
- METHYLENE DIBROMIDE
- Methane,dibromo
- CH2Br2
- Methane, dibromo-
二溴甲烷物理化学性质
[ 密度 ]:
2.4±0.1 g/cm3
[ 沸点 ]:
97.0±0.0 °C at 760 mmHg
[ 熔点 ]:
-52 °C
[ 分子式 ]:
CH2Br2
[ 分子量 ]:
173.835
[ 闪点 ]:
-22.1±17.7 °C
[ 精确质量 ]:
171.852310
[ LogP ]:
1.54
[ 外观性状 ]:
无色液体
[ 蒸汽密度 ]:
6.05 (vs air)
[ 蒸汽压 ]:
48.7±0.1 mmHg at 25°C
[ 折射率 ]:
1.533
[ 储存条件 ]:
库房通风低温干燥,与氧化剂、食品添加剂分开存放
[ 稳定性 ]:
Stable. Incompatible with strong oxidizing agents, aluminium, magnesium. Reacts violently with potassium.
[ 水溶解性 ]:
0.1 g/100 mL (20 ºC)
二溴甲烷MSDS
二溴甲烷毒性和生态
CHEMICAL IDENTIFICATION
- RTECS NUMBER :
- PA7350000
- CHEMICAL NAME :
- Methane, dibromo-
- CAS REGISTRY NUMBER :
- 74-95-3
- BEILSTEIN REFERENCE NO. :
- 0969143
- LAST UPDATED :
- 199710
- DATA ITEMS CITED :
- 16
- MOLECULAR FORMULA :
- C-H2-Br2
- MOLECULAR WEIGHT :
- 173.85
- WISWESSER LINE NOTATION :
- E1E
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 108 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LC50 - Lethal concentration, 50 percent kill
- ROUTE OF EXPOSURE :
- Inhalation
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 40 gm/m3/2H
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Subcutaneous
- SPECIES OBSERVED :
- Rodent - mouse
- DOSE/DURATION :
- 3738 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- 1 gm/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Administration onto the skin
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- >4 gm/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Rectal
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- 5 gm/kg
- TOXIC EFFECTS :
- Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - respiratory stimulation Gastrointestinal - changes in structure or function of salivary glands
- TYPE OF TEST :
- TDLo - Lowest published toxic dose
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 333 mg/kg/28D-C
- TOXIC EFFECTS :
- Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - dehydrogenases
MUTATION DATA
- TYPE OF TEST :
- Cytogenetic analysis
- TEST SYSTEM :
- Rodent - hamster Lung
- DOSE/DURATION :
- 1 umol/L
- REFERENCE :
- TECSDY Toxicological and Environmental Chemistry. (Gordon & Breach Science Pub. Inc., 1 Park Ave., New York, NY 10016) V.3(3/4)- 1981- Volume(issue)/page/year: 13,205,1987 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-RUSSIA:STEL 10 mg/m3 JAN 1993 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X4051 No. of Facilities: 33 (estimated) No. of Industries: 2 No. of Occupations: 2 No. of Employees: 1065 (estimated) No. of Female Employees: 452 (estimated)
二溴甲烷安全信息
[ 符号 ]:
GHS07
[ 信号词 ]:
Warning
[ 危害声明 ]:
H332-H412
[ 警示性声明 ]:
P273
[ 个人防护装备 ]:
Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
[ 危害码 (欧洲) ]:
Xn:Harmful
[ 风险声明 (欧洲) ]:
R20;R52/53
[ 安全声明 (欧洲) ]:
S24-S61-S45-S36/37-S16-S7
[ 危险品运输编码 ]:
UN 2664 6.1/PG 3
[ WGK德国 ]:
2
[ RTECS号 ]:
PA7350000
[ 包装等级 ]:
III
[ 危险类别 ]:
6.1
[ 海关编码 ]:
2903399010
二溴甲烷合成路线
二溴甲烷上下游产品
二溴甲烷上游产品
二溴甲烷下游产品
二溴甲烷制备
1.三溴甲烷法 先用三氧化二砷和液碱反应,配制亚砷酸钠液。将亚砷酸钠液加热至65℃,在搅拌下徐徐加入溴仿,全部加完后继续搅拌回流4h,使反应完全,将反应物倾入5~6倍水中,吸出油状物,进行分馏。再用水洗至中性,用氯化钙脱水、精馏,得产品。
2.二氯甲烷法 在工业上尚有将无水CH2CL2在无水ALBr3催化下与HBr反应制取,同时还产生氯溴甲烷。
3.溴氯甲烷溴化氢法 反应式如下:
二溴甲烷海关
[ 海关编码 ]: 2903399010
[ 中文概述 ]:
2903399010 二溴甲烷。监管条件:AB(入境货物通关单,出境货物通关单)。增值税率:17.0%。退税率:9.0%。最低关税:5.5%。普通关税:30.0%
[ 申报要素 ]: 品名, 成分含量, 用途
[ 监管条件 ]: A.入境货物通关单 B.出境货物通关单
[ 检验检疫 ]: M.进口商品检验 N.出口商品检验
[ Summary ]:
2903399010 dibromomethane。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tarrif:5.5%。general tariff:30.0%
二溴甲烷文献
Nucl. Med. Biol. 41(6) , 524-35, (2014)
A radioligand for measuring the density of corticotropin-releasing factor subtype-1 receptors (CRF1 receptors) in living animal and human brain with positron emission tomography (PET) would be a usefu...
Improved quality control of [18F]fluoromethylcholine.Nucl. Med. Biol. 38(8) , 1143-8, (2011)
With respect to the broad application of [(18)F-methyl]fluorocholine (FCH), there is a need for a safe, but also efficient and convenient way for routine quality control of FCH. Therefore, a GC- metho...
Dimethylselenide as a probe for reactions of halogenated alkoxyl radicals in aqueous solution. Degradation of dichloro- and dibromomethane.J. Phys. Chem. A 112(26) , 5908-16, (2008)
Using pulse radiolysis and steady-state gamma-radiolysis techniques, it has been established that, in air-saturated aqueous solutions, peroxyl radicals CH 2HalOO (*) (Hal = halogen) derived from CH 2C...
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相关化合物
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