128889-91-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128889-91-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,8 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 128889-91:
(8*1)+(7*2)+(6*8)+(5*8)+(4*8)+(3*9)+(2*9)+(1*1)=188
188 % 10 = 8
So 128889-91-8 is a valid CAS Registry Number.