1721-60-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1721-60-4 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 1 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1721-60:
(6*1)+(5*7)+(4*2)+(3*1)+(2*6)+(1*0)=64
64 % 10 = 4
So 1721-60-4 is a valid CAS Registry Number.