81811-52-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81811-52-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,1 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81811-52:
(7*8)+(6*1)+(5*8)+(4*1)+(3*1)+(2*5)+(1*2)=121
121 % 10 = 1
So 81811-52-1 is a valid CAS Registry Number.