77500-71-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77500-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,5,0 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77500-71:
(7*7)+(6*7)+(5*5)+(4*0)+(3*0)+(2*7)+(1*1)=131
131 % 10 = 1
So 77500-71-1 is a valid CAS Registry Number.