117838-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117838-91-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,8,3 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 117838-91:
(8*1)+(7*1)+(6*7)+(5*8)+(4*3)+(3*8)+(2*9)+(1*1)=152
152 % 10 = 2
So 117838-91-2 is a valid CAS Registry Number.