217471-17-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217471-17-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,4,7 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 217471-17:
(8*2)+(7*1)+(6*7)+(5*4)+(4*7)+(3*1)+(2*1)+(1*7)=125
125 % 10 = 5
So 217471-17-5 is a valid CAS Registry Number.