Products

1,3,5-Tribromobenzene

Product name: 1,3,5-Tribromobenzene
Alias: Tribromobenzene
Chemical formula: C₆H₃Br₃
Molecular weight: 314.8
CAS number: 626-39-1
EINECS number: 210-947-3
Melting point: 117~121℃
Boiling point: 269.39℃
Flash point: 115.49℃
Density: 2.281g/cm³
1,3,5-Tribromobenzene is a chemical substance with the chemical formula C6H3Br3. It is a light yellow powder that is insoluble in water but soluble in hot ethanol, acetic acid, with a melting point of 124℃ and a boiling point of 271℃. 

Basic Information

Product name: 1,3,5-Tribromobenzene
Alias: 1,3,5-tribromo-benzen; Benzene,1,3,5-tribromo-; Tribromobenzene
CAS No.: 626-39-1
Molecular formula: C6H3Br3
Molecular weight: 314.8
EINECS No.: 210-947-3
Physical and Chemical Properties
Property: Light yellow-brown powder
Solubility: Insoluble in water, soluble in hot ethanol, glacial acetic acid 
Melting point: 121°C 
Boiling point: 271°C
Flash point: 271°C
Density (g/mL, 25℃): 2.637 
Gas standard entropy (J/(mol·K)): 398.89
Gas standard heat capacity (J/(mol·K)): 134.77 
Vapor pressure (kPa, 25℃): 0.002
Combustion enthalpy (kJ/mol): 58.68
Logarithm of the octanol-water partition coefficient: 4.16 
Molecular Structure Data
1,  Molar refractivity: 49.32
2, Molar volume (cm3/mol): 137.9
3, Isometric capacity (90.2K): 358.7
4, Surface tension (dyne/cm): 45.6
5, Polarizability (10-24cm3): 19.55 
Properties and Stability
Keep away from oxidizing agents.
Ecological Data
Slightly harmful to water, do not allow large quantities of this product to come into contact with groundwater, waterways, or sewage systems. Do not discharge materials into the surrounding environment without government permission. 
Synthetic Method
In a 15L round-bottomed flask, place 100g (1.1mol) of aniline, 1L of water, and 100mL (12.mol) of concentrated hydrochloric acid. When the aniline is dissolved, add 5L of water, and place the flask in an ice bath to cool. Then slowly add 577g (185mL, 3.6mol) of bromine until the solution has a significant yellow color, which takes about 34 hours, and the reaction is complete. Filter the tribromophenol using a Buchner funnel, wash thoroughly with water, and dry. In a 5L flask equipped with a reflux condenser, place damp tribromophenol, 2.1L of 95% ethanol, and 525mL of benzene. Heat the flask on a steam bath to dissolve the tribromophenol. In this solution, add 140mL of concentrated sulfuric acid, and then add 140g (2.03mol) of solid sodium nitrite while maintaining the normal progress of the reaction. When the reaction is complete, heat the solution to a boil and maintain this state until no more gas evolves, and then place it in a warm place for 3 hours. When the mixture cools, filter, and then add a solution prepared from 150mL of concentrated sulfuric acid and 1.5L of water to the solid. After the excess sodium nitrite has decomposed, filter, wash the solid with water, and then wash with a small amount of ethanol. The crude dried 1,3,5-Tribromobenzene is brownish red, with a melting point of 112~116℃, and the yield is 250~260g.  
Main Uses
Important organic synthesis raw material and intermediate
Safety information
Hazard identification: Xi (irritating)  
Hazard class code: R36/37/38 (Irritating to eyes, respiratory system and skin. )
Safety instructions: S22 (Do not breathe dust )
S24/25 (Avoid contact with skin and eyes ) 
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. )