20972-64-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20972-64-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,7 and 2 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 20972-64:
(7*2)+(6*0)+(5*9)+(4*7)+(3*2)+(2*6)+(1*4)=109
109 % 10 = 9
So 20972-64-9 is a valid CAS Registry Number.