53-91-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 53-91-8 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 5 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 53-91:
(4*5)+(3*3)+(2*9)+(1*1)=48
48 % 10 = 8
So 53-91-8 is a valid CAS Registry Number.