653-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 653-18-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,5 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 653-18:
(5*6)+(4*5)+(3*3)+(2*1)+(1*8)=69
69 % 10 = 9
So 653-18-9 is a valid CAS Registry Number.