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D44804

Sigma-Aldrich

α,α′-Dibromo-p-xylene

97%

Synonym(s):

1,4-Bis(bromomethyl)benzene, p-Xylylene dibromide

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5 G
$57.90
25 G
$130.00
100 G
$301.75

About This Item

Linear Formula:
C6H4(CH2Br)2
CAS Number:
623-24-5
Molecular Weight:
263.96
Beilstein/REAXYS Number:
1100019
EC Number:
210-781-1
MDL number:
MFCD00000182
UNSPSC Code:
12352100
PubChem Substance ID:
24893876
NACRES:
NA.22

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Quality Level

100

assay

97%

form

crystals

bp

245 °C (lit.)

mp

143-145 °C (lit.)

SMILES string

BrCc1ccc(CBr)cc1

InChI

1S/C8H8Br2/c9-5-7-1-2-8(6-10)4-3-7/h1-4H,5-6H2

InChI key

RBZMSGOBSOCYHR-UHFFFAOYSA-N

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General description

α,α′-Dibromo-p-xylene, also known as p-xylylene dibromide, is an aliphatic dihalide that serves as a versatile intermediate in organic reactions, including the synthesis of aromatic ionene polymers and dual-site phase-transfer catalysts. [1] [2]

Application

α,α′-Dibromo-p-xylene can be used as a building block to synthesize:      
  • Phthalazinone derivatives, which are reported as potent inhibitors of phosphodiesterase 4.    
  • N-Phenylated polyamine via polycondensation reaction with aniline and α, α′-dianilino-p-xylene.     
  • Porous polymeric network (PPN) via a Friedel-Crafts alkylation reaction with triphenylamine using FeCl3 as an oxidizing agent.

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

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Certificates of Analysis (COA)

Lot/Batch Number
WXBF4432V
WXBF1748V
WXBF1131V
WXBF0921
WXBF0920V

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Questions

1–2 of 2 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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