6447-28-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6447-28-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,4 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 6447-28:
(6*6)+(5*4)+(4*4)+(3*7)+(2*2)+(1*8)=105
105 % 10 = 5
So 6447-28-5 is a valid CAS Registry Number.