7417-23-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7417-23-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,1 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7417-23:
(6*7)+(5*4)+(4*1)+(3*7)+(2*2)+(1*3)=94
94 % 10 = 4
So 7417-23-4 is a valid CAS Registry Number.