100001-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 100001-18-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,0,0,0 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 100001-18:
(8*1)+(7*0)+(6*0)+(5*0)+(4*0)+(3*1)+(2*1)+(1*8)=21
21 % 10 = 1
So 100001-18-1 is a valid CAS Registry Number.