121683-17-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121683-17-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,6,8 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 121683-17:
(8*1)+(7*2)+(6*1)+(5*6)+(4*8)+(3*3)+(2*1)+(1*7)=108
108 % 10 = 8
So 121683-17-8 is a valid CAS Registry Number.