198639-73-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 198639-73-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,6,3 and 9 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 198639-73:
(8*1)+(7*9)+(6*8)+(5*6)+(4*3)+(3*9)+(2*7)+(1*3)=205
205 % 10 = 5
So 198639-73-5 is a valid CAS Registry Number.