2167-09-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2167-09-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,6 and 7 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 2167-09:
(6*2)+(5*1)+(4*6)+(3*7)+(2*0)+(1*9)=71
71 % 10 = 1
So 2167-09-1 is a valid CAS Registry Number.