77658-50-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77658-50-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,5 and 8 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77658-50:
(7*7)+(6*7)+(5*6)+(4*5)+(3*8)+(2*5)+(1*0)=175
175 % 10 = 5
So 77658-50-5 is a valid CAS Registry Number.