74522-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74522-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,5,2 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 74522-81:
(7*7)+(6*4)+(5*5)+(4*2)+(3*2)+(2*8)+(1*1)=129
129 % 10 = 9
So 74522-81-9 is a valid CAS Registry Number.