5181-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5181-81-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,1,8 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5181-81:
(6*5)+(5*1)+(4*8)+(3*1)+(2*8)+(1*1)=87
87 % 10 = 7
So 5181-81-7 is a valid CAS Registry Number.