91555-80-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91555-80-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,5,5 and 5 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91555-80:
(7*9)+(6*1)+(5*5)+(4*5)+(3*5)+(2*8)+(1*0)=145
145 % 10 = 5
So 91555-80-5 is a valid CAS Registry Number.