1,4-Dibromopentane
- CAS NO.:626-87-9
- Empirical Formula: C5H10Br2
- Molecular Weight: 229.94
- MDL number: MFCD00000153
- EINECS: 210-967-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-12-28 18:13:10
What is 1,4-Dibromopentane?
Chemical properties
clear colorless to light yellow-brown liquid with a wine smell.
The Uses of 1,4-Dibromopentane
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
Properties of 1,4-Dibromopentane
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 | n |
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) |
Safety information for 1,4-Dibromopentane
Signal word | Warning |
Pictogram(s) |
Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 1,4-Dibromopentane
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