21916-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21916-52-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,1 and 6 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21916-52:
(7*2)+(6*1)+(5*9)+(4*1)+(3*6)+(2*5)+(1*2)=99
99 % 10 = 9
So 21916-52-9 is a valid CAS Registry Number.
21916-52-9Relevant academic research and scientific papers
2- and 4-Pyridones by Oxidative Demethylation of 2- and 4-Methylpyridinium Cations
Katritzky, Alan R.,Patel, Ranjan C.,Shanta, Mohammed
, p. 1888 - 1889 (2007/10/02)
1-Substituted-2- and -4-methylpyridinium cations are converted by pentyl or ethyl nitrite and sodium methoxide into 1-substituted-2- and -4-pyridones respectively.
