138791-20-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138791-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,9 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138791-20:
(8*1)+(7*3)+(6*8)+(5*7)+(4*9)+(3*1)+(2*2)+(1*0)=155
155 % 10 = 5
So 138791-20-5 is a valid CAS Registry Number.