7767-78-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7767-78-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,6 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 7767-78:
(6*7)+(5*7)+(4*6)+(3*7)+(2*7)+(1*8)=144
144 % 10 = 4
So 7767-78-4 is a valid CAS Registry Number.