71740-87-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71740-87-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,7,4 and 0 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 71740-87:
(7*7)+(6*1)+(5*7)+(4*4)+(3*0)+(2*8)+(1*7)=129
129 % 10 = 9
So 71740-87-9 is a valid CAS Registry Number.