21031-49-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21031-49-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,3 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21031-49:
(7*2)+(6*1)+(5*0)+(4*3)+(3*1)+(2*4)+(1*9)=52
52 % 10 = 2
So 21031-49-2 is a valid CAS Registry Number.