21761-19-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21761-19-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,6 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21761-19:
(7*2)+(6*1)+(5*7)+(4*6)+(3*1)+(2*1)+(1*9)=93
93 % 10 = 3
So 21761-19-3 is a valid CAS Registry Number.