220509-52-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220509-52-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,5,0 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 220509-52:
(8*2)+(7*2)+(6*0)+(5*5)+(4*0)+(3*9)+(2*5)+(1*2)=94
94 % 10 = 4
So 220509-52-4 is a valid CAS Registry Number.