73923-34-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 73923-34-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,9,2 and 3 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 73923-34:
(7*7)+(6*3)+(5*9)+(4*2)+(3*3)+(2*3)+(1*4)=139
139 % 10 = 9
So 73923-34-9 is a valid CAS Registry Number.
73923-34-9Relevant academic research and scientific papers
Synthesis and Reactions of 2-Arylazo-2-nitro-keten Aminals
Schaefer, H.,Gewald, K.
, p. 87 - 93 (2007/10/02)
N,N'-Disubstituted 1-nitro-2,2-diamino ethylenes 1 undergo azo-coupling to form the title compounds 2.Their treatment with oxalyl chloride yields the imidazolidin-4,5-dione-derivatives 4. 2 react with phosgene and thiophosgene to form 6-nitro-2,4-diaryl-5
