209111-71-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 209111-71-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,1,1 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 209111-71:
(8*2)+(7*0)+(6*9)+(5*1)+(4*1)+(3*1)+(2*7)+(1*1)=97
97 % 10 = 7
So 209111-71-7 is a valid CAS Registry Number.