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1,4-Dibromopentane

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1,4-Dibromopentane Basic information

Product Name:
1,4-Dibromopentane
Synonyms:
  • sodium 1-amino-4-(2,4-dimethylanilino)-9,10-dioxo-2-anthracenesulfonate
  • 1,4-DibroMopentane, 97% 25GR
  • 1,4-DIBROMOPENTANE
  • (RS)-1,4-Dibromopentane
  • 1,4-dibromo-pentan
  • 1,4-DibromopentaneDISC 05/09/02
  • pentane,1,4-dibromo-
  • 1,4-Dibromopentane,97%
CAS:
626-87-9
MF:
C5H10Br2
MW:
229.94
EINECS:
210-967-2
Product Categories:
  • Alkyl
  • Halogenated Hydrocarbons
  • Organic Building Blocks
Mol File:
626-87-9.mol
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1,4-Dibromopentane Chemical Properties

Melting point:
-34.4 °C (lit.)
Boiling point:
98-99 °C/25 mmHg (lit.)
Density 
1.687 g/mL at 25 °C (lit.)
refractive index 
n20/D 1.508
Flash point:
>110°C
storage temp. 
2-8°C
form 
clear liquid
color 
Colorless to Light orange to Yellow
Specific Gravity
1.687
Water Solubility 
Insoluble in water.
BRN 
605295
CAS DataBase Reference
626-87-9(CAS DataBase Reference)
NIST Chemistry Reference
Pentane, 1,4-dibromo-(626-87-9)
EPA Substance Registry System
Pentane, 1,4-dibromo- (626-87-9)
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Safety Information

Hazard Codes 
Xi,Xn
Risk Statements 
36/37/38-36/38-22
Safety Statements 
26-36-37/39
WGK Germany 
3
TSCA 
Yes
HS Code 
29033919

MSDS

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1,4-Dibromopentane Usage And Synthesis

Chemical Properties

clear colorless to light yellow-brown liquid with a wine smell.

Uses

1,4-Dibromopentane is used in the preparation of pharaoh ant trail pheromone stereoisomer, indolizidine alkaloid. It is also involved in the preparation 1,2-dimethyl-1-phenylcyclopentane and boc-L-2-amino-6-bromoheptanoic acid.

Preparation

1,4-Dibromopentane is synthesized by ring-opening bromination of 2-methyltetrahydrofuran with hydrobromic acid and sulfuric acid. First, add hydrobromic acid into the reaction pot for cooling, slowly add 2-methyltetrahydrofuran and sulfuric acid in turn under stirring, and finish the addition when the temperature does not exceed 40°C. The temperature was raised to 60°C, reacted for 2h, and then reacted at 80-85°C for 4h. After cooling, the bromide was separated and washed with water until neutral to obtain 1,4-dibromopentane as an oily substance. Yield 92.5%.

Synthesis Reference(s)

Journal of the American Chemical Society, 74, p. 917, 1952 DOI: 10.1021/ja01124a016

1,4-Dibromopentane Preparation Products And Raw materials

Preparation Products

Raw materials

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