6639-80-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6639-80-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,3 and 9 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 6639-80:
(6*6)+(5*6)+(4*3)+(3*9)+(2*8)+(1*0)=121
121 % 10 = 1
So 6639-80-1 is a valid CAS Registry Number.
6639-80-1Relevant articles and documents
Decarbonylation of quinoxalines
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, (2008/06/13)
Designated 2-formylquinoxaline 1,4-dioxides are decarbonylated by the action of an unhindered secondary amine having a pKa greater than about 8 to produce the corresponding decarbonylated product.