33544-22-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33544-22-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,5,4 and 4 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 33544-22:
(7*3)+(6*3)+(5*5)+(4*4)+(3*4)+(2*2)+(1*2)=98
98 % 10 = 8
So 33544-22-8 is a valid CAS Registry Number.
33544-22-8Relevant academic research and scientific papers
Process of producing 2-cyano-4-oxo-4H-benzopyran compounds
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, (2008/06/13)
There is disclosed a process of producing a 2-cyano-4-oxo-4H-benzopyran compound of the general formula (2): STR1 wherein R1 and R2 are independently hydrogen, halogen, hydroxy, C1 -C5 alkyl, C1 -Csu
