21972-24-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21972-24-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,7 and 2 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21972-24:
(7*2)+(6*1)+(5*9)+(4*7)+(3*2)+(2*2)+(1*4)=107
107 % 10 = 7
So 21972-24-7 is a valid CAS Registry Number.