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HomeProduct name list2-Bromobutane

2-Bromobutane

Synonym(s):sec-Butyl bromide;2-Bromobutane;sec-Butyl bromide

  • CAS NO.:78-76-2
  • Empirical Formula: C4H9Br
  • Molecular Weight: 137.02
  • MDL number: MFCD00000156
  • EINECS: 201-140-7
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-07-30 14:17:11
2-Bromobutane  Structural

What is 2-Bromobutane ?

Chemical properties

colourless liquid with a pleasant odour

The Uses of 2-Bromobutane

2-Bromobutane is used in the various organic synthesis, existing as a grignard reagent.

The Uses of 2-Bromobutane

2-Bromobutane is utilized in the synthesis of non-nucleosides. It is used as a solvent as well as an intermediate in organic synthesis. It is an important raw material used to prepare Grignard reagent by reacting with magnesium. Further, it reacts with hydrocyanic acid to prepare sodium salt to get (+-)-sec-butyl cyanide. It is an important raw material used to prepare Grignard reagent by reacting with magnesium.

General Description

A colorless to pale-yellow colored liquid with a pleasant odor. Flash point 65°F. Insoluble in water and denser than water. Vapors are heavier than air and may be narcotic in high concentrations. Used to make other chemicals.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

Halogenated aliphatic compounds, such as 2-Bromobutane , 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, and epoxides. Gives toxic fumes of bromine when burned.

Hazard

Narcotic in high concentration. Flammable, dangerous fire risk.

Health Hazard

Irritating to eyes, nose, throat, upper respiratory tract, and skin. Symptoms of exposure include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.

Safety Profile

Narcotic in high concentrations. Questionable carcinogen with experimental neoplastigenic data. See also BROMIDES and CHLORINATED HYDROCARBONS, ALIPHATIC. Flammable liquid. Dangerous fire hazard when exposed to heat or flame. When heated to decomposition it emits toxic fumes of Br-; can react with oxidzing materials. To fight fire, use water, spray or mist, foam, Co2, dry chemical.

Purification Methods

Wash 2-bromobutane with conc HCl, water, 10% aqueous NaHSO3, and then water. Dry it with CaCl2, Na2SO4 or anhydrous K2CO3, and fractionally distil it through a 1m glass helices packed column. [Beilstein 1 IV 261.]

Properties of 2-Bromobutane

Melting point: -112 °C
Boiling point: 91 °C(lit.)
Density  1.255 g/mL at 25 °C(lit.)
vapor pressure  70 hPa (20 °C)
refractive index  n20/D 1.4369(lit.)
Flash point: 70 °F
storage temp.  Store at +2°C to +8°C.
solubility  <1g/l
form  Liquid
color  Clear colorless to yellow-brown
explosive limit 2.6-6.6%(V)
Water Solubility  insoluble
Merck  14,1554
BRN  505949
Dielectric constant 8.6400000000000006
Stability: Stable. Flammable. Incompatible with strong oxidizing agents.
CAS DataBase Reference 78-76-2(CAS DataBase Reference)
NIST Chemistry Reference Butane, 2-bromo-(78-76-2)
EPA Substance Registry System Butane, 2-bromo- (78-76-2)

Safety information for 2-Bromobutane

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
GHS Hazard Statements H225:Flammable liquids
H412:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233:Keep container tightly closed.
P240:Ground/bond container and receiving equipment.
P241:Use explosion-proof electrical/ventilating/lighting/…/equipment.
P242:Use only non-sparking tools.
P273:Avoid release to the environment.

Computed Descriptors for 2-Bromobutane

InChIKey UPSXAPQYNGXVBF-UHFFFAOYSA-N

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