19891-90-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19891-90-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,9 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19891-90:
(7*1)+(6*9)+(5*8)+(4*9)+(3*1)+(2*9)+(1*0)=158
158 % 10 = 8
So 19891-90-8 is a valid CAS Registry Number.