2103-37-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2103-37-9 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, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 2103-37:
(6*2)+(5*1)+(4*0)+(3*3)+(2*3)+(1*7)=39
39 % 10 = 9
So 2103-37-9 is a valid CAS Registry Number.