220437-80-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220437-80-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,4,3 and 7 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 220437-80:
(8*2)+(7*2)+(6*0)+(5*4)+(4*3)+(3*7)+(2*8)+(1*0)=99
99 % 10 = 9
So 220437-80-9 is a valid CAS Registry Number.