110991-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 110991-42-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,0,9,9 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 110991-42:
(8*1)+(7*1)+(6*0)+(5*9)+(4*9)+(3*1)+(2*4)+(1*2)=109
109 % 10 = 9
So 110991-42-9 is a valid CAS Registry Number.