7778-22-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7778-22-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,7 and 8 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 7778-22:
(6*7)+(5*7)+(4*7)+(3*8)+(2*2)+(1*2)=135
135 % 10 = 5
So 7778-22-5 is a valid CAS Registry Number.