220391-49-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220391-49-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,3,9 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 220391-49:
(8*2)+(7*2)+(6*0)+(5*3)+(4*9)+(3*1)+(2*4)+(1*9)=101
101 % 10 = 1
So 220391-49-1 is a valid CAS Registry Number.