4489-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4489-91-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,8 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4489-91:
(6*4)+(5*4)+(4*8)+(3*9)+(2*9)+(1*1)=122
122 % 10 = 2
So 4489-91-2 is a valid CAS Registry Number.