77217-11-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77217-11-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,2,1 and 7 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77217-11:
(7*7)+(6*7)+(5*2)+(4*1)+(3*7)+(2*1)+(1*1)=129
129 % 10 = 9
So 77217-11-9 is a valid CAS Registry Number.