10309-68-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 10309-68-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,3,0 and 9 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 10309-68:
(7*1)+(6*0)+(5*3)+(4*0)+(3*9)+(2*6)+(1*8)=69
69 % 10 = 9
So 10309-68-9 is a valid CAS Registry Number.