2103-09-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2103-09-5 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 3 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 2103-09:
(6*2)+(5*1)+(4*0)+(3*3)+(2*0)+(1*9)=35
35 % 10 = 5
So 2103-09-5 is a valid CAS Registry Number.