42924-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42924-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,2 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 42924-20:
(7*4)+(6*2)+(5*9)+(4*2)+(3*4)+(2*2)+(1*0)=109
109 % 10 = 9
So 42924-20-9 is a valid CAS Registry Number.