1239023-23-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1239023-23-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,9,0,2 and 3 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1239023-23:
(9*1)+(8*2)+(7*3)+(6*9)+(5*0)+(4*2)+(3*3)+(2*2)+(1*3)=124
124 % 10 = 4
So 1239023-23-4 is a valid CAS Registry Number.