658684-17-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 658684-17-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,8,6,8 and 4 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 658684-17:
(8*6)+(7*5)+(6*8)+(5*6)+(4*8)+(3*4)+(2*1)+(1*7)=214
214 % 10 = 4
So 658684-17-4 is a valid CAS Registry Number.