17620-21-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17620-21-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,6,2 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 17620-21:
(7*1)+(6*7)+(5*6)+(4*2)+(3*0)+(2*2)+(1*1)=92
92 % 10 = 2
So 17620-21-2 is a valid CAS Registry Number.