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Benzo[1,2-b:4,5-b']dithiophene-4,8-dione

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione structure

CAS No.: 32281-36-0

Chemical Name:: Benzo[1,2-b:4,5-b']dithiophene-4,8-dione

Synonyms: BDTO;NAIL;thieno[2,3-f][1]benzothiole-4,8-dione;Nmrk;Ly-90;SLAMF4;NSC 149690;4,5-b']dithiophene-4,8-dione;Thieno[2,3-f]benzothiophene-4,8-dione;Benzo[1,2-b:4,5-b']dithiophene-4,8-dione

CBNumber:: CB62514684

Molecular Formula:: C10H4O2S2

Molecular Weight:: 220.27

MDL Number:: MFCD01927240

MOL File:: 32281-36-0.mol

MSDS File:: SDS

Last updated:2026-05-28 02:39:28

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Benzo[1,2-b:4,5-b']dithiophene-4,8-dione Properties

Melting point	260-262℃
Boiling point	408.0±35.0 °C(Predicted)
Density	1.595
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
form	powder to crystal
color	White to Amber to Dark green
InChI	InChI=1S/C10H4O2S2/c11-7-5-1-3-13-9(5)8(12)6-2-4-14-10(6)7/h1-4H
InChIKey	SIUXRPJYVQQBAF-UHFFFAOYSA-N
SMILES	C12C(=O)C3C=CSC=3C(=O)C=1C=CS2
FDA UNII	G1C271HP09
UNSPSC Code	12352103
NACRES	NA.23

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H315-H319-H335
Precautionary statements	P280-P302+P352-P362+P364
Safety Statements	24/25
WGK Germany	3
HS Code	29349990
Storage Class	11 - Combustible Solids

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione price More Price(52)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	760137	Benzo[1,2-b:4,5-b′]dithiophene-4,8-dione 97%	32281-36-0	1g	$165	2026-04-30	Buy
TCI Chemical	B3793	Benzo[1,2-b:4,5-b']dithiophene-4,8-dione >98.0%(GC)	32281-36-0	1g	$126	2026-04-30	Buy
TCI Chemical	B3793	Benzo[1,2-b:4,5-b']dithiophene-4,8-dione >98.0%(GC)	32281-36-0	5g	$418	2026-04-30	Buy
Usbiological	264408	Benzo[1,2-b:4,5-b']dithiophene-4,8-dione Asreported	32281-36-0	1g	$460	2026-06-03	Buy
Usbiological	264408	Benzo[1,2-b:4,5-b']dithiophene-4,8-dione Asreported	32281-36-0	2g	$672	2026-06-03	Buy

Product number	Packaging	Price	Buy
760137	1g	$165	Buy
B3793	1g	$126	Buy
B3793	5g	$418	Buy
264408	1g	$460	Buy
264408	2g	$672	Buy

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione Chemical Properties, Uses, Production

Description

Benzo[1,2-b:4,5-b’]dithiophene is a planar symmetrical molecular structure of the thiophene derivative, enabling a better π-πstacking and good electron delocalization that encourages charge transport. In recent years, it has been intensively studied for the application of OFETs and OPVs. The incorporation of a low-band-gap unit into the benzo[1,2-b:4,5-b’]dithiophene unit could potentially result in a red-shifted absorption due to its electron-rich properties. Benzo[1,2-b:4,5-b’]dithiophene can be chemically modified to fine-tune its chemical structure and electron properties (e.g. band gap), energy levels, and charge mobility of the small molecule/polymers of interest (at a molecular level).

Uses

suzuki reaction

Uses

BDTD can be used as an acceptor layer in the fabrication of polymer based solar cells.

General Description

Benzo[1,2-b:4,5-b′]dithiophene-4,8-dione (BDTD) is a conductive polymer with a symmetric and planar conjugated structure which has a hole mobility of 0.25 cm²V^-1s^-1.

Synthesis

73540-75-7

32281-36-0

The general procedure for the synthesis of benzo[1,2-B:4,5-B']dithiophene-4,8-dione from N,N-diethyl-3-thiophenecarboxamide was as follows: 6.82 g (37.25 mmol, 1.0 eq.) of N,N-diethyl-3-thiophenecarboxamide was added to a 100 mL three-necked flask protected by nitrogen and three nitrogen substitutions were performed. Subsequently 30 mL of freshly distilled tetrahydrofuran was added. The reaction mixture was cooled in an ice-salt bath until the internal temperature was reduced to 0 °C, then 15.0 mL (37.25 mmol, 1.0 eq.) of 2.5 M n-butyllithium solution was slowly added dropwise for a controlled time of 20 min. After the dropwise addition, the reaction mixture was stirred at room temperature for 30 minutes. Subsequently, the reaction mixture was poured into 40 g of crushed ice and stirred overnight. On the following day, the product was collected by diafiltration and washed sequentially with water, methanol and petroleum ether. Finally, the resulting yellow powder was dried under vacuum to afford benzo[1,2-B:4,5-B']dithiophene-4,8-dione 3.50 g in 86.1% yield.

References

[1] Patent: CN106866700, 2017, A. Location in patent: Paragraph 0022; 0024; 0025; 0026; 0034; 0038; 0040; 0041-042
[2] Journal of Materials Chemistry A, 2014, vol. 2, # 33, p. 13580 - 13586
[3] Journal of Materials Chemistry A, 2016, vol. 4, # 47, p. 18409 - 18415
[4] Organic Electronics: physics, materials, applications, 2016, vol. 37, p. 312 - 325
[5] Chemistry - A European Journal, 2015, vol. 21, # 45, p. 16252 - 16265

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione Preparation Products And Raw materials

Raw materials

N,N-diethylthiophene-3-carboxylamide Tetrahydrofuran n-Butyllithium

Preparation Products

2,6-Bis(trimethyltin)-4,8-dioctyloxybenzo[1,2-b:3,4-b]dithiophene 1,1'-[4,8-Bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl]bis[1,1,1-trimethylstannane] 4,8-bis((2-ethylhexyl)oxy)benzo[1,2-b:4,5-b']dithiophene-2,6-dicarbaldehyde Benzo[1,2-b:4,5-b']dithiophene-4,8-diol 2,6-Bis(triMethyltin)-4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo [1,2-b:4,5-b']dithiophene

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione Suppliers

Global Suppliers ( 203)

Supplier	Tel	Email	Country	ProdList	Advantage
Henan Weituxi Chemical Technology Co., Ltd.	0371-63284658 18135795563	3905209149@qq.com	China	9705	58
Derthon Optoelectronic Materials Sci. Tech. Co., Ltd.	0755-26718755 13266723223	sales@derthon.com	China	1022	56
Hyper, Inc.	18966379725	1028592743@qq.com	China	82	58
Suzhou GR Pharmaceutical Co., Ltd.	0512-62867016; 13771772901	sale@gr-chem.com	China	265	55
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
China Langchem Inc.	021-58956006,021-58950017 15800617331	sales@langchem.com	China	209	57
Shenzhen Feiming Science and Technology Co.,Ltd.	0755-85232577	sale@fmect.com	China	96	62
Shanghai Sunway Pharmaceutical Technology Co., Ltd	13761987713	hxzheng@sunwaypharm.cn	China	8663	57

Supplier	Advantage
Henan Weituxi Chemical Technology Co., Ltd.	58
Derthon Optoelectronic Materials Sci. Tech. Co., Ltd.	56
Hyper, Inc.	58
Suzhou GR Pharmaceutical Co., Ltd.	55
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
TCI (Shanghai) Development Co., Ltd.	81
China Langchem Inc.	57
Shenzhen Feiming Science and Technology Co.,Ltd.	62
Shanghai Sunway Pharmaceutical Technology Co., Ltd	57

View Latest Price from Benzo[1,2-b:4,5-b']dithiophene-4,8-dione manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-09-16	Benzo[1,2-b:4,5-b’]dithiophene-4,8-dione 32281-36-0	$48.00	5g	97%	100kg	Zhengzhou Alfa Chemical Co.,Ltd
2026-09-02	Benzo[1,2-b:4,5-b']dithiophene-4,8-dione 32281-36-0	$1.10-32.00	1kg	99%		Henan Fengda Chemical Co., Ltd
2026-08-20	Benzo[1,2-b:4,5-b']dithiophene-4,8-dione 32281-36-0	$1.10	1g	99.00%	100 Tons	Dideu Industries Group Limited

Benzo[1,2-b:4,5-b’]dithiophene-4,8-dione
32281-36-0
$48.00
97%
Zhengzhou Alfa Chemical Co.,Ltd

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione
32281-36-0
$1.10-32.00
99%
Henan Fengda Chemical Co., Ltd

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione
32281-36-0
$1.10
99.00%
Dideu Industries Group Limited

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione Spectrum

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione(32281-36-0)¹HNMR

32281-36-0 (Benzo[1,2-b:4,5-b']dithiophene-4,8-dione) Related Search:

4,7-Dibromo-2,1,3-benzothiadiazole Methyl benzo[b]thiophene-2-carboxylate 2-Amino-1-butanol 2,6-DibroMobenzo[1,2-b:4,5-b']dithiophene 2,6-Dibromobenzo[1,2-b:4,5-b']dithiophene-4,8-dione

Dithieno[2,3-d:2',3'-d]benzo[1,2-b:4,5-b']dithiophene-5,10-dione 2,6-Dibromo-4,8-bis[(2-ethylhexyl)oxy]-benzo[1,2-b:4,5-b']dithiophene 2,6-Bis(trimethylstannyl)benzo[1,2-b:4,5-b']dithiophene 4,8-bis((2-ethylhexyl)oxy)benzo[1,2-b:4,5-b']dithiophene-2,6-dicarbaldehyde 4,8-Bis((2-octyldodecyl)oxy)benzo[1,2-b:4,5-b']dithiophene

4,8-Bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene BDTO26-Br Butyl stearate 1b Boron

Benzo[1,2-b:6,5-b']dithiophene-4,5-dione

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Benzo[1,2-b:4,5-b']dithiophene-4,8-dione 4,8-Dihydrobenzo[1,2-b:4,5-b']dithiophen-4,8-dione 8-Dihydrobenzo[1,2-b:4,5-b']dithiophen-4,8-dione NSC 149690 benzo[1,2-b:4,5-b']bisthiophene-4,8-dione 4,8‐Dihydrobenzo[1,2‐ b:4,5‐b']dithiophen‐ 4,8‐dion Benzo[1,2-b:4,5-b']dithiophene-4,8-dione 97% Thieno[2,3-f]benzothiophene-4,8-dione thieno[2,3-f][1]benzothiole-4,8-dione 4,5-b']dithiophene-4,8-dione 4,10-DITHIATRICYCLO[7.3.0.0,DODECA-1(9),3(7),5,11-TETRAENE-2,8-DIONE Benzo[1,2-b:4,5-b']dithiophene-4,8-dione > Benzo[1,2-b:4,5-b′]dithiophene-4,8-dione,98% Benzo[1,2-b:4,5-b']dithiophene-4,8-dione ISO 9001：2015 REACH 4,8-dihydrobenzo[1,2-b:4,5-b']dithiophene-4,8-dione Benzo[1,2-b:4,5-b′]dithiophene-4,8-dione Benzo[1,2-b:4,5-b′]dithiophene-4,8-dione, CAS 32281-36-0 Ly-90 SLAMF4 Nmrk Benzo[1,2-b:4,5-b']dithiophene-4,8-dione 98%min BDTO NAIL 32281-36-0