173203-42-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 173203-42-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,2,0 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 173203-42:
(8*1)+(7*7)+(6*3)+(5*2)+(4*0)+(3*3)+(2*4)+(1*2)=104
104 % 10 = 4
So 173203-42-4 is a valid CAS Registry Number.