6430-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6430-21-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,3 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6430-21:
(6*6)+(5*4)+(4*3)+(3*0)+(2*2)+(1*1)=73
73 % 10 = 3
So 6430-21-3 is a valid CAS Registry Number.