205173-56-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 205173-56-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,1,7 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 205173-56:
(8*2)+(7*0)+(6*5)+(5*1)+(4*7)+(3*3)+(2*5)+(1*6)=104
104 % 10 = 4
So 205173-56-4 is a valid CAS Registry Number.