6407-21-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6407-21-2 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 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6407-21:
(6*6)+(5*4)+(4*0)+(3*7)+(2*2)+(1*1)=82
82 % 10 = 2
So 6407-21-2 is a valid CAS Registry Number.