172304-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172304-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,3,0 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 172304-90:
(8*1)+(7*7)+(6*2)+(5*3)+(4*0)+(3*4)+(2*9)+(1*0)=114
114 % 10 = 4
So 172304-90-4 is a valid CAS Registry Number.