1177421-97-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1177421-97-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,7,7,4,2 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1177421-97:
(9*1)+(8*1)+(7*7)+(6*7)+(5*4)+(4*2)+(3*1)+(2*9)+(1*7)=164
164 % 10 = 4
So 1177421-97-4 is a valid CAS Registry Number.