2109-94-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2109-94-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,0 and 9 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 2109-94:
(6*2)+(5*1)+(4*0)+(3*9)+(2*9)+(1*4)=66
66 % 10 = 6
So 2109-94-6 is a valid CAS Registry Number.