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28992-93-0

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28992-93-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28992-93-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,9,9 and 2 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 28992-93:
(7*2)+(6*8)+(5*9)+(4*9)+(3*2)+(2*9)+(1*3)=170
170 % 10 = 0
So 28992-93-0 is a valid CAS Registry Number.

28992-93-0Relevant academic research and scientific papers

Theoretical and Spectroscopical Investigations of Indigo Dyes, XXI. - Synthesis and Spectroscopical Properties of 4,4,4',4'-Tetramethyl-3,3'-dione, a Compound Containing the Basic Chromophore of Indigo

Wille, Eike,Luettke, Wolfgang

, p. 2039 - 2054 (2007/10/02)

4,4,4',4'-Tetramethyl-3,3'-dione (3) has been prepared by potassium cyanide catalyzed dimerization of 4,4-dimethyl-1-tosyl-3-pyrrolidinone (13).The parallelism of the chemical and spectroscopical properties of 3 and indigo 2 show

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