6405-91-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6405-91-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,0 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6405-91:
(6*6)+(5*4)+(4*0)+(3*5)+(2*9)+(1*1)=90
90 % 10 = 0
So 6405-91-0 is a valid CAS Registry Number.