39423-21-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 39423-21-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,4,2 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 39423-21:
(7*3)+(6*9)+(5*4)+(4*2)+(3*3)+(2*2)+(1*1)=117
117 % 10 = 7
So 39423-21-7 is a valid CAS Registry Number.