90197-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90197-91-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,1,9 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 90197-91:
(7*9)+(6*0)+(5*1)+(4*9)+(3*7)+(2*9)+(1*1)=144
144 % 10 = 4
So 90197-91-4 is a valid CAS Registry Number.