221171-93-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221171-93-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,7 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221171-93:
(8*2)+(7*2)+(6*1)+(5*1)+(4*7)+(3*1)+(2*9)+(1*3)=93
93 % 10 = 3
So 221171-93-3 is a valid CAS Registry Number.