117711-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117711-42-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,7,1 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 117711-42:
(8*1)+(7*1)+(6*7)+(5*7)+(4*1)+(3*1)+(2*4)+(1*2)=109
109 % 10 = 9
So 117711-42-9 is a valid CAS Registry Number.