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2-Bromobutane

Product name 2-Bromobutane
English alias butane,2-bromo;1-methylpropyl bromide;
Structural formula
Molecular formula C4H9Br
Molecular weight 137.01800
Appearance Colorless liquid has a pleasant odor.
Melting point -112 ℃
Relative density  1.255 g/mL at 25 ℃(lit.)
Boiling point 91 ℃(lit.)
Water solubility Immiscible
Refractivity n20/D 1.4369(lit.)
Content ≥99.0%
Moisture ≤0.05%
Stability Stable. Flammable. Incompatible with strong oxidizing agents.
Flash point 70 °F
Vapor pressure  
Storage Ventilation, low-temperature drying, and separate storage from oxidants in the warehouse
Use Used as a solvent and also in organic synthesis.
Production method It is obtained by reacting sec-butanol with bromic acid in the presence of sulfuric acid. Slowly add concentrated sulfur to hydrobromic acid and mix, then add secondary butanol, reflux reaction for 2-3 hours, distill bromide, layer the distillate, wash the organic phase sequentially with water, concentrated hydrochloric acid, water, sodium carbonate dilute solution, and water, and dry with anhydrous calcium chloride. Finally, distill and collect the 90.5-92.5 ℃ fraction to obtain the finished product.
UN No. UN 2339 3/PG 2
Hazard class 3
Packing group II
HS code 2903399090
Packing 250KGS/steel drum
CAS # 78-76-2

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