917100-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 917100-91-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,7,1,0 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 917100-91:
(8*9)+(7*1)+(6*7)+(5*1)+(4*0)+(3*0)+(2*9)+(1*1)=145
145 % 10 = 5
So 917100-91-5 is a valid CAS Registry Number.