203207-17-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203207-17-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,2,0 and 7 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 203207-17:
(8*2)+(7*0)+(6*3)+(5*2)+(4*0)+(3*7)+(2*1)+(1*7)=74
74 % 10 = 4
So 203207-17-4 is a valid CAS Registry Number.