17603-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17603-21-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,6,0 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 17603-21:
(7*1)+(6*7)+(5*6)+(4*0)+(3*3)+(2*2)+(1*1)=93
93 % 10 = 3
So 17603-21-3 is a valid CAS Registry Number.