91687-45-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91687-45-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,8 and 7 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 91687-45:
(7*9)+(6*1)+(5*6)+(4*8)+(3*7)+(2*4)+(1*5)=165
165 % 10 = 5
So 91687-45-5 is a valid CAS Registry Number.