1109-83-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1109-83-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,0 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1109-83:
(6*1)+(5*1)+(4*0)+(3*9)+(2*8)+(1*3)=57
57 % 10 = 7
So 1109-83-7 is a valid CAS Registry Number.