1097-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1097-42-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,0,9 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1097-42:
(6*1)+(5*0)+(4*9)+(3*7)+(2*4)+(1*2)=73
73 % 10 = 3
So 1097-42-3 is a valid CAS Registry Number.