4220-07-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4220-07-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,2,2 and 0 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 4220-07:
(6*4)+(5*2)+(4*2)+(3*0)+(2*0)+(1*7)=49
49 % 10 = 9
So 4220-07-9 is a valid CAS Registry Number.