21651-59-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21651-59-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,6,5 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21651-59:
(7*2)+(6*1)+(5*6)+(4*5)+(3*1)+(2*5)+(1*9)=92
92 % 10 = 2
So 21651-59-2 is a valid CAS Registry Number.