Name | 1,5-Dibromopentane |
Synonyms | 1,5-Dibromopentane Pentane-1,5-dibromide 1,5-PENTANE DIBROMIDE Pentamethylene dibromide |
CAS | 111-24-0 |
EINECS | 203-849-7 |
InChI | InChI=1/C5H10Br2/c6-4-2-1-3-5-7/h1-5H2 |
InChIKey | IBODDUNKEPPBKW-UHFFFAOYSA-N |
Molecular Formula | C5H10Br2 |
Molar Mass | 229.941 |
Density | 1.673g/cm3 |
Melting Point | -34℃ |
Boling Point | 224.5°C at 760 mmHg |
Flash Point | 94.7°C |
Water Solubility | insoluble |
Vapor Presure | 0.136mmHg at 25°C |
Vapor Density | 8 (vs air) |
Appearance | Form Liquid color Clear colorless to yellow-brown |
Storage Condition | Sealed in dry,Room Temperature |
Refractive Index | 1.503 |
Physical and Chemical Properties | Colorless or light yellow liquid. Melting point -34 ℃ (freezing point -39.5 ℃), boiling point 222.3 ℃,111-112 ℃(2.66kPa),98.6 ℃(1.33kPa), relative density 1.7018(20/4 ℃), refractive index 1.5126, flash point 79 ℃. Soluble in benzene and chloroform, insoluble in water. It has an aromatic smell. |
Use | Used as an intermediate in organic synthesis |
Hazard Symbols | Xn - Harmful |
Risk Codes | R22 - Harmful if swallowed R36/38 - Irritating to eyes and skin. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
WGK Germany | 3 |
RTECS | SA0320000 |
TSCA | Yes |
HS Code | 29033036 |
It is obtained by ring-opening bromination of tetrahydropyran. In a 500ml flask, 250g of 48% hydrobromic acid, 75g of concentrated sulfuric acid and 21.5g of resteamed tetrahydropyran (fraction at 86.5-87.5 ℃) were sequentially added into a reflux condenser, and the brown mixture was heated and refluxed gently for 3h. After cooling to room temperature, separate the lower layer of dibromide and wash it once with saturated sodium carbonate solution and water. Drying with anhydrous calcium chloride. Decompression distillation, collection of 104-106 degrees C (2.53kPa) fraction is the finished product, the yield is 46-47g, the yield is 80-82%.