20491-44-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20491-44-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,9 and 1 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 20491-44:
(7*2)+(6*0)+(5*4)+(4*9)+(3*1)+(2*4)+(1*4)=85
85 % 10 = 5
So 20491-44-5 is a valid CAS Registry Number.