77766-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77766-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,7,6 and 6 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 77766-19:
(7*7)+(6*7)+(5*7)+(4*6)+(3*6)+(2*1)+(1*9)=179
179 % 10 = 9
So 77766-19-9 is a valid CAS Registry Number.