7091-89-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7091-89-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,0,9 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7091-89:
(6*7)+(5*0)+(4*9)+(3*1)+(2*8)+(1*9)=106
106 % 10 = 6
So 7091-89-6 is a valid CAS Registry Number.