1220-71-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1220-71-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,2 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1220-71:
(6*1)+(5*2)+(4*2)+(3*0)+(2*7)+(1*1)=39
39 % 10 = 9
So 1220-71-9 is a valid CAS Registry Number.