77977-28-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77977-28-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,7 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 77977-28:
(7*7)+(6*7)+(5*9)+(4*7)+(3*7)+(2*2)+(1*8)=197
197 % 10 = 7
So 77977-28-7 is a valid CAS Registry Number.