7531-11-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7531-11-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,3 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7531-11:
(6*7)+(5*5)+(4*3)+(3*1)+(2*1)+(1*1)=85
85 % 10 = 5
So 7531-11-5 is a valid CAS Registry Number.