20803-40-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20803-40-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,0 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20803-40:
(7*2)+(6*0)+(5*8)+(4*0)+(3*3)+(2*4)+(1*0)=71
71 % 10 = 1
So 20803-40-1 is a valid CAS Registry Number.