109697-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109697-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,6,9 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 109697-20:
(8*1)+(7*0)+(6*9)+(5*6)+(4*9)+(3*7)+(2*2)+(1*0)=153
153 % 10 = 3
So 109697-20-3 is a valid CAS Registry Number.