77688-88-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77688-88-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,8 and 8 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 77688-88:
(7*7)+(6*7)+(5*6)+(4*8)+(3*8)+(2*8)+(1*8)=201
201 % 10 = 1
So 77688-88-1 is a valid CAS Registry Number.