217449-15-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217449-15-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,4,4 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 217449-15:
(8*2)+(7*1)+(6*7)+(5*4)+(4*4)+(3*9)+(2*1)+(1*5)=135
135 % 10 = 5
So 217449-15-5 is a valid CAS Registry Number.