1663-11-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1663-11-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,6 and 3 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1663-11:
(6*1)+(5*6)+(4*6)+(3*3)+(2*1)+(1*1)=72
72 % 10 = 2
So 1663-11-2 is a valid CAS Registry Number.