2903-13-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2903-13-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,9,0 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 2903-13:
(6*2)+(5*9)+(4*0)+(3*3)+(2*1)+(1*3)=71
71 % 10 = 1
So 2903-13-1 is a valid CAS Registry Number.