2172-22-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2172-22-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,7 and 2 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 2172-22:
(6*2)+(5*1)+(4*7)+(3*2)+(2*2)+(1*2)=57
57 % 10 = 7
So 2172-22-7 is a valid CAS Registry Number.