139009-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139009-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,0,0 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139009-23:
(8*1)+(7*3)+(6*9)+(5*0)+(4*0)+(3*9)+(2*2)+(1*3)=117
117 % 10 = 7
So 139009-23-7 is a valid CAS Registry Number.