| Identification | More | [Name]
Dibromomethane | [CAS]
74-95-3 | [Synonyms]
DBM
DIBROMOMETHANE
METHYLENE BROMIDE
METHYLENE DIBROMIDE
CH2Br2
Dibrommethan
dibromo-methan
methane,dibromo
Methane,dibromo-
Rcra waste number U068
rcrawastenumberu068
DIBROMOMETHANE, 1000MG, NEAT
DIBROMOMETHANE, 99+%
DIBROMOMETHANE, 1X1ML, MEOH, 2000UG/ML
DIBROMOMETHANE, 1X1ML, MEOH, 5000UG/ML
dibromomethane solution
Dibromomethane, 99%, stab. with 50ppm BHT
Dibromomethane (1mg/ml in Methanol) [for Water Analysis] | [EINECS(EC#)]
200-824-2 | [Molecular Formula]
CH2Br2 | [MDL Number]
MFCD00000168 | [Molecular Weight]
173.83 | [MOL File]
74-95-3.mol |
| Chemical Properties | Back Directory | [Appearance]
Methylene bromide is a colorless liquid with a
sweet, pleasant odor. | [Melting point ]
-52 °C | [Boiling point ]
96-98 °C(lit.) | [density ]
2.477 g/mL at 25 °C(lit.)
| [vapor density ]
6.05 (vs air)
| [vapor pressure ]
34.9 mm Hg ( 20 °C)
| [refractive index ]
n20/D 1.541(lit.)
| [Fp ]
96-98°C | [storage temp. ]
Refrigerator | [solubility ]
11.7g/l | [form ]
Liquid | [color ]
Clear colorless to slightly brown | [Stability:]
Stable. Incompatible with strong oxidizing agents, aluminium, magnesium. Reacts violently with potassium. | [Water Solubility ]
0.1 g/100 mL (20 ºC) | [Merck ]
14,6061 | [BRN ]
969143 | [Dielectric constant]
6.7（10℃） | [Uses]
Organic synthesis, solvent. | [CAS DataBase Reference]
74-95-3(CAS DataBase Reference) | [NIST Chemistry Reference]
Methane, dibromo-(74-95-3) | [EPA Substance Registry System]
74-95-3(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,T,F | [Risk Statements ]
R20:Harmful by inhalation.
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R39/23/24/25:Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed .
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed .
R11:Highly Flammable. | [Safety Statements ]
S24:Avoid contact with skin .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37:Wear suitable protective clothing and gloves .
S16:Keep away from sources of ignition-No smoking .
S7:Keep container tightly closed . | [RIDADR ]
UN 2664 6.1/PG 3
| [WGK Germany ]
2
| [RTECS ]
PA7350000
| [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
III | [HS Code ]
29033990 | [Safety Profile]
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 | [Hazardous Substances Data]
74-95-3(Hazardous Substances Data) | [Toxicity]
LD50 orally in Rabbit: 108 mg/kg LD50 dermal Rabbit > 4000 mg/kg |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
Dichloromethane-->Bromoform-->Bromochloromethane | [Preparation Products]
(1R-cis)-3-(2,2-dibromoethenyl)-2,2-dimethylcyclopropane carboxylic acid-->3-ISOPROPENYL-ALPHA,ALPHA-DIMETHYLBENZYL ISOCYANATE-->VINYLCYCLOHEXANE-->Decabromodiphenyl oxide-->Myclobutanil-->Nysted Reagent-->FOSTHIETAN-->2,3-(METHYLENEDIOXY)BENZALDEHYDE-->BENZO[1,3]DIOXOLE-5-SULFONYL CHLORIDE-->A-(BROMOMETHYL)-A-BUTYL4-CHLOROBENZENEACETONITRILE-->4-Bromobenzyl bromide-->Methyl cyclopropane carboxylate-->4-(BROMOMETHYL)PHENOL-->1-methyl-4-[(4-methylphenyl)sulfonyloxymethoxysulfonyl]benzene-->1,1-Dibromoethane-->1(3H)-ISOBENZOFURANONE, 5-FLUORO--->Bis[(pinacolato)boryl]Methane-->3b,5-Dihydroxy-6b,7b:15b,16b-dimethylene-5b-androstan-17-one |
| Hazard Information | Back Directory | [General Description]
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. | [Reactivity Profile]
Halogenated aliphatic compounds, such as DIBROMOMETHANE(74-95-3), 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. | [Air & Water Reactions]
Insoluble in water. | [Health Hazard]
INHALATION: Anesthetic effects, nausea and drunkenness. CONTACT WITH SKIN AND EYES: Skin irritation of eyes and nose. | [Potential Exposure]
Methylene bromide is used as
a solvent and as a chemical intermediate. | [Fire Hazard]
Special Hazards of Combustion Products: Dissociation products generated in a fire may be irritating or toxic. | [First aid]
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts the
skin, remove contaminated clothing and wash immediately
with soap and water. Seek medical attention immediately.
If this chemical has been inhaled, remove from exposure,
begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if
heart action has stopped. Transfer promptly to a medical
facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce
vomiting. Do not make an unconscious person vomit | [Shipping]
UN2664 Dibromomethane, Hazard Class: 6.1;
Labels: 6.1-Poisonous materials. | [Incompatibilities]
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 | [Description]
Dibromomethane is a member of the class of bromomethanes that is methane substituted by two bromo groups. It is produced by marine algae. It has a role as a marine metabolite and an algal metabolite. It is a member of bromomethanes and a bromohydrocarbon. | [Chemical Properties]
colourless liquid | [Chemical Properties]
Methylene bromide is a colorless liquid with a
sweet, pleasant odor. | [Waste Disposal]
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 | [Definition]
ChEBI: A member of the class of bromomethanes that is methane substituted by two bromo groups. It is produced by marine algae. | [Hazard]
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; | [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 | [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. | [storage]
Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Store in tightly closed container in a well-ventilatedarea away from potential high heat sources. Where possible,automatically pump liquid from drums or other storage containers to process containers. |
|
|