198904-17-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 198904-17-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,9,0 and 4 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 198904-17:
(8*1)+(7*9)+(6*8)+(5*9)+(4*0)+(3*4)+(2*1)+(1*7)=185
185 % 10 = 5
So 198904-17-5 is a valid CAS Registry Number.