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Product Code B811-1g
Price £200 ex. VAT

Specifications | MSDS | Literature and Reviews


Br-BT-CHO (CAS number 1071224-34-4), namely 7-Bromobenzo[c][1,2,5]thiadiazole-4-carbaldehyde, is a benzothiadiazole derivative with both bromine and aldehyde functional groups. Br-BT-CHO can be used as intermediate for further either carbon-carbon single bond (C-C) via Stille coupling, or double bond (C=C) formation via Aldol condensation reactions.

Br-BT-CHO as an intermediate can be used for the synthesis of non-fullerene acceptors such as o-IDTBR and FBR.

benzothiadiazole derivative

Benzothiadiazole derivative

For the synthesis of NFAs

High purity 1071224-34-4

High purity

>98% Br-BT-CHO Purity

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Substituted with bromide and aldehyde for muti-step reactions

Substituted with bromide and aldehyde

For muti-step reactions

General Information


CAS Number 1071224-34-4
Chemical Formula C7H3BrN2OS
Molecular Weight 243.08 g/mol
Full Name 7-Bromobenzo[c][1,2,5]thiadiazole-4-carbaldehyde
Synonyms 7-Bromo-4-formyl-2,1,3-benzothiadiazole
Classification / Family Benzothiadiazole, Monomer and intermediates, None-fullerene acceptors (NFAs), NFA-OSCs, printing electronics

Chemical Structure


Chemical structure of Br-BT-CHO, 7-Bromo-2,1,3-benzothiadiazole-4carboxaldehyde, CAS 1071224-34-4
Chemical structure of Br-BT-CHO - 7-Bromo-2,1,3-benzothiadiazole-4carboxaldehyde, CAS 1071224-34-4

Product Details


Purity >98% (by NMR)
Melting Point 192 °C - 194 °C
Appearance Slightly yellow crystalline powder

MSDS Documentation


FIC MSDSBr-BT-CHO MSDS Sheet

Literature and Reviews


  1. P3HT-Based Polymer Solar Cells with 8.25% Efficiency Enabled by a Matched Molecular Acceptor and Smart Green-Solvent Processing Technology, X. Xu et al., Adv. Mater., 31 (52), 1906045 (2019); DOI: 10.1002/adma.201906045.
  2. π-Bridge-Independent 2-(Benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile-Substituted Nonfullerene Acceptors for Efficient Solar Cells, K. Wang et al., Chem. Mater., 28 (7), 2200–2208 (2016); DOI: 10.1021/acs.chemmater.6b00131.
  3. Significant Improvement of Dye-Sensitized Solar Cell Performance by Small Structural Modification in π-Conjugated Donor–Acceptor Dyes, S. Haid et al., Adv. Funct. Mater., 22, 1291–1302 (2012); DOI: 10.1002/adfm.201102519.
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