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HomeProduct name listalpha,alpha'-Dibromo-p-xylene

alpha,alpha'-Dibromo-p-xylene

Synonym(s):p-Xylylene dibromide;1,4-Bis(bromomethyl)benzene;DMF

  • CAS NO.:623-24-5
  • Empirical Formula: C8H8Br2
  • Molecular Weight: 263.96
  • MDL number: MFCD00000182
  • EINECS: 210-781-1
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-05-07 14:24:42
alpha,alpha'-Dibromo-p-xylene Structural

What is alpha,alpha'-Dibromo-p-xylene?

Chemical properties

α,α′-Dibromo-p-xylene is a white to light yellow crystal powde,it reacts with nucleophiles such as chloride leads to the formation of diphenyl ethers.

The Uses of alpha,alpha'-Dibromo-p-xylene

alpha,alpha'-Dibromo-p-xylene is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals.

Synthesis Reference(s)

Tetrahedron Letters, 35, p. 7055, 1994 DOI: 10.1016/0040-4039(94)88224-X

Synthesis

The synthesis of alpha,alpha'-Dibromo-p-xylene begins with the reaction of pyridinedicarboxylic acid and bromine in the presence of an organic solvent. This reaction yields a mixture comprising diphenyl ethers and other halogenated aromatic compounds, which can subsequently be purified through crystallization or distillation methods.

Purification Methods

Distil it under a vacuum and recrystallise it from EtOH, *benzene or chloroform. [Wenner Org Chem 17 527 1952, Beilstein 5 H 385, 5 I 187, 5 II 301, 5 III 859, 5 IV 970.]

Properties of alpha,alpha'-Dibromo-p-xylene

Melting point: 143-145 °C(lit.)
Boiling point: 245 °C(lit.)
Density  2.012
refractive index  1.614
Flash point: 155-158°C/14mm
storage temp.  Keep in dark place,Sealed in dry,Room Temperature
solubility  dioxane: soluble1g/10 mL (hot)
form  Crystalline Powder and Coarse Crystals
color  White to beige
Water Solubility  soluble, hydrolyses
Sensitive  Lachrymatory
BRN  1100019
CAS DataBase Reference 623-24-5(CAS DataBase Reference)
NIST Chemistry Reference Benzene, 1,4-bis(bromomethyl)-(623-24-5)
EPA Substance Registry System 1,4-Bis(bromomethyl)benzene (623-24-5)

Safety information for alpha,alpha'-Dibromo-p-xylene

Signal word Warning
Pictogram(s)
ghs
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 alpha,alpha'-Dibromo-p-xylene

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