21231-79-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21231-79-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,3 and 1 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21231-79:
(7*2)+(6*1)+(5*2)+(4*3)+(3*1)+(2*7)+(1*9)=68
68 % 10 = 8
So 21231-79-8 is a valid CAS Registry Number.