81139-11-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81139-11-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,3 and 9 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 81139-11:
(7*8)+(6*1)+(5*1)+(4*3)+(3*9)+(2*1)+(1*1)=109
109 % 10 = 9
So 81139-11-9 is a valid CAS Registry Number.