77-05-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77-05-4 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 77-05:
(4*7)+(3*7)+(2*0)+(1*5)=54
54 % 10 = 4
So 77-05-4 is a valid CAS Registry Number.