42123-07-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42123-07-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,1,2 and 3 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 42123-07:
(7*4)+(6*2)+(5*1)+(4*2)+(3*3)+(2*0)+(1*7)=69
69 % 10 = 9
So 42123-07-9 is a valid CAS Registry Number.