42023-34-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42023-34-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,0,2 and 3 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 42023-34:
(7*4)+(6*2)+(5*0)+(4*2)+(3*3)+(2*3)+(1*4)=67
67 % 10 = 7
So 42023-34-7 is a valid CAS Registry Number.