171018-42-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 171018-42-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,0,1 and 8 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 171018-42:
(8*1)+(7*7)+(6*1)+(5*0)+(4*1)+(3*8)+(2*4)+(1*2)=101
101 % 10 = 1
So 171018-42-1 is a valid CAS Registry Number.