217440-31-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217440-31-8 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 1 respectively.
Calculate Digit Verification of CAS Registry Number 217440-31:
(8*2)+(7*1)+(6*7)+(5*4)+(4*4)+(3*0)+(2*3)+(1*1)=108
108 % 10 = 8
So 217440-31-8 is a valid CAS Registry Number.