198639-85-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 198639-85-9 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, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 198639-85:
(8*1)+(7*9)+(6*8)+(5*6)+(4*3)+(3*9)+(2*8)+(1*5)=209
209 % 10 = 9
So 198639-85-9 is a valid CAS Registry Number.