77504-16-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77504-16-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,5,0 and 4 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 77504-16:
(7*7)+(6*7)+(5*5)+(4*0)+(3*4)+(2*1)+(1*6)=136
136 % 10 = 6
So 77504-16-6 is a valid CAS Registry Number.