217440-32-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217440-32-9 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 0 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 217440-32:
(8*2)+(7*1)+(6*7)+(5*4)+(4*4)+(3*0)+(2*3)+(1*2)=109
109 % 10 = 9
So 217440-32-9 is a valid CAS Registry Number.