6641-63-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6641-63-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,4 and 1 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6641-63:
(6*6)+(5*6)+(4*4)+(3*1)+(2*6)+(1*3)=100
100 % 10 = 0
So 6641-63-0 is a valid CAS Registry Number.