77520-65-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77520-65-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,5,2 and 0 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 77520-65:
(7*7)+(6*7)+(5*5)+(4*2)+(3*0)+(2*6)+(1*5)=141
141 % 10 = 1
So 77520-65-1 is a valid CAS Registry Number.