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Product Code B2251-25g
Price £66 ex. VAT

A fluorinated benzonitrile building block

Used in synthesizing ligands for OLEDs, photoredox catalysts and APIs


Specifications | MSDS | Literature and Reviews


2,4-Difluorobenzonitrile (CAS number 3939-09-1) is a benzonitrile derivative with two fluorine atoms at 2- and 4-positions. 2,4-Difluorobenzonitrile is commonly used as a molecular building block for introducing fluorinated benzonitrile to the target molecules by nucleophilic aromatic substitution. The reactive side is primarily on the para-position to the nitrile group, as it is less sterically hindered. 2,4-Difluorobenzonitrile  functionalised triazolopyrimidine has been comprehensively studied on treatment of Alzheimer's disease.

2,4-Difluorobenzonitrile reacts with sodium azide for fluorinated tetrazole, a 5-membered ring heterocyclic with four nitrogen atoms. Fluorinated phenyltetrazole forms complexes with iridium showing blue light photoluminescence quantum yield up to 76%. The complexes are promising to be used in OLEDs and photoredox catalytic reactions.

Multiple functional groups

Multiple functional groups

For facile synthesis

Fluorinated building block

Fluorinated benzonitrile building block

For drug discovery, photoredox catalysts, OLEDs research

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High purity 3939-09-01

High purity

>98% High purity

General Information


CAS Number 3939-09-1
Chemical Formula C7H3F2N
Full Name 2,4-Difluorobenzonitrile
Molecular Weight 139.10 g/mol
Synonyms N/A
Classification / Family Fluorinated building block, Ligands, OLEDs, APIs, Photoredox catalysts

Chemical Structure


2,4-Difluorobenzonitrile chemical structure, CAS 3939-09-1
2,4-Difluorobenzonitrile chemical structure, CAS 3939-09-1

Product Details


Purity 98%
Melting Point Tm = 47 – 49 °C
Appearance White to off-white solid

MSDS Documentation


2,4-Difluorobenzonitrile2,4-Difluorobenzonitrile MSDS Sheet

Literature and Reviews


  1. Evaluation of structure-activity relationship of microtubule(MT)-targeting 1,2,4-triazolo[1,5-a]pyrimidines identifies new candidates for neurodegenerative tauopathies, K. Oukoloff et al., J. Med. Chem., 64(2), 1073–1102(2021); DOI: 10.1021/acs.jmedchem.0c01605.
  2. Iridium(III) complexes with fluorinated phenyl-tetrazoles as cyclometalating ligands: enhanced excited-state energy and blue emission, A. Baschieri et al., Inorg. Chem., 59(22), 16238–16250(2020); DOI: 10.1021/acs.inorgchem.0c01995.
  3. Measuring the microphase separation scale of polyurethanes with a vibration-induced emission-based ratiometric 'fluorescent ruler', ACS Appl. Mater. Interfaces, 11, 39351–39358(2019); DOI: 10.1021/acsami.9b13193.
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