138840-64-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138840-64-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,8,4 and 0 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 138840-64:
(8*1)+(7*3)+(6*8)+(5*8)+(4*4)+(3*0)+(2*6)+(1*4)=149
149 % 10 = 9
So 138840-64-9 is a valid CAS Registry Number.