6654-42-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6654-42-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,5 and 4 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 6654-42:
(6*6)+(5*6)+(4*5)+(3*4)+(2*4)+(1*2)=108
108 % 10 = 8
So 6654-42-8 is a valid CAS Registry Number.