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74228-25-4 Usage

General Description

3-Di Cyano Methylidene-2,3-Dihydroxythiophene-3-Ylidino is a chemical compound with the molecular formula C6H3N3O2S. It is a highly reactive and versatile building block in organic chemistry, commonly used in the synthesis of various pharmaceuticals and agrochemicals. 3-DI CYANO METHYLIDINE-2,3-DIHYDROXYTHIOPHENE-3-YIDINO contains a thiophene ring with two hydroxyl groups and a cyano-methylidene group, making it a valuable intermediate in the development of new drugs and crop protection products. Its unique chemical structure and reactivity make it an important tool for researchers and chemists working in the field of organic synthesis and drug discovery.

Check Digit Verification of cas no

The CAS Registry Mumber 74228-25-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,2,2 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 74228-25:
124 % 10 = 4
So 74228-25-4 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017


1.1 GHS Product identifier

Product name 3-(dicyanomethylidene)-2,3-dihydrobenzothiophene-1,1-dioxide

1.2 Other means of identification

Product number -
Other names 3-dicyanomethylidene-1-thiaindane-1,1-dione

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:74228-25-4 SDS

74228-25-4Relevant articles and documents

Fused ring non-fullerene acceptors with benzothiophene dioxide end groups and their side chain effect investigations

Deng, Min,Li, Ruipeng,Peng, Qiang,Xu, Xiaopeng,Yu, Liyang

, (2020/04/23)

The development of small molecule-based non-fullerene acceptors (NF-SMAs) greatly advanced the performances of polymer solar cells (PSCs) in recent years. As the foreseeability of commercializing this technology in the future, interest in reducing the materials cost is rising. To this end, efforts have been made in this work on exploring the usage of commercially available chemical segment of benzothiophene dioxide (BC) in constructing efficient NF-SMAs. Thus, we designed and synthesized two BC-based NF-SMAs, which showed high power conversion efficiency (PCE) of 7.59% also by device engineering and side chain engineering. Our work revealed the full potential of using BC end groups in constructing high-performance NF-SMAs and demonstrated the application of side chain engineering in tuning material properties and performances.

Fused-ring non-fullerene receptor material and preparation method thereof and organic solar battery


Paragraph 0084; 0100-0103; 0171; 0186-0188, (2019/02/04)

The invention relates to a fused-ring non-fullerene receptor material and a preparation method thereof and an organic solar battery. The fused-ring non-fullerene receptor material adopts a structuralgeneral formula as shown in the specification, wherein R

Method for preparing disperse blue 354


Paragraph 0013; 0036; 0041; 0046; 0051; 0056; 0061, (2017/08/28)

The invention discloses a method for preparing disperse blue 354. The method comprises the following steps: using dichloroethane as a reaction solvent, carbonyl iron powder as a catalyst, 3(2H)-indanone sulfur-1,1-dioxide and malononitrile as reaction raw materials, and obtaining an intermediate nitrile compound through a cyanation reaction; putting acetic acid, the intermediate nitrile compound, 2-methyl-4-aminobenzaldehyde and phosphoric acid into a reaction container to be stirred uniformly, then adding aluminum trichloride, putting bromohexane into a reaction system of a condensation section through a condensation reaction, and thus obtaining a target product through an alkylation reaction. A raw material 4-(N,N-dihexyl amino)-2-tolyl aldehyde is replaced with the 2-methyl-4-aminobenzaldehyde and the bromohexane; although one reaction is added, the added alkylation reaction and the condensation reaction are in the same system, and the operation difficulty coefficient is not added additionally; more importantly, the change of the technology promotes the process of the reaction to be more thorough, the yield of the product is further improved, and the total yield is 84% or more than 84%; and more importantly, industrialization is easy to realize, and the unit consumption of the product is reduced.

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