1000-11-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1000-11-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,0,0 and 0 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1000-11:
(6*1)+(5*0)+(4*0)+(3*0)+(2*1)+(1*1)=9
9 % 10 = 9
So 1000-11-9 is a valid CAS Registry Number.