109809-54-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109809-54-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,8,0 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 109809-54:
(8*1)+(7*0)+(6*9)+(5*8)+(4*0)+(3*9)+(2*5)+(1*4)=143
143 % 10 = 3
So 109809-54-3 is a valid CAS Registry Number.