109565-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109565-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,5,6 and 5 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 109565-57:
(8*1)+(7*0)+(6*9)+(5*5)+(4*6)+(3*5)+(2*5)+(1*7)=143
143 % 10 = 3
So 109565-57-3 is a valid CAS Registry Number.