20945-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20945-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,4 and 5 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20945-67:
(7*2)+(6*0)+(5*9)+(4*4)+(3*5)+(2*6)+(1*7)=109
109 % 10 = 9
So 20945-67-9 is a valid CAS Registry Number.