13683-53-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 13683-53-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,6,8 and 3 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 13683-53:
(7*1)+(6*3)+(5*6)+(4*8)+(3*3)+(2*5)+(1*3)=109
109 % 10 = 9
So 13683-53-9 is a valid CAS Registry Number.