123939-69-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 123939-69-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,9,3 and 9 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 123939-69:
(8*1)+(7*2)+(6*3)+(5*9)+(4*3)+(3*9)+(2*6)+(1*9)=145
145 % 10 = 5
So 123939-69-5 is a valid CAS Registry Number.