77511-56-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77511-56-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,5,1 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 77511-56:
(7*7)+(6*7)+(5*5)+(4*1)+(3*1)+(2*5)+(1*6)=139
139 % 10 = 9
So 77511-56-9 is a valid CAS Registry Number.