64642-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 64642-21-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,6,4 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 64642-21:
(7*6)+(6*4)+(5*6)+(4*4)+(3*2)+(2*2)+(1*1)=123
123 % 10 = 3
So 64642-21-3 is a valid CAS Registry Number.