77506-20-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77506-20-8 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 6 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77506-20:
(7*7)+(6*7)+(5*5)+(4*0)+(3*6)+(2*2)+(1*0)=138
138 % 10 = 8
So 77506-20-8 is a valid CAS Registry Number.