1722-66-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1722-66-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,2 and 2 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1722-66:
(6*1)+(5*7)+(4*2)+(3*2)+(2*6)+(1*6)=73
73 % 10 = 3
So 1722-66-3 is a valid CAS Registry Number.