7481-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7481-20-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,8 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 7481-20:
(6*7)+(5*4)+(4*8)+(3*1)+(2*2)+(1*0)=101
101 % 10 = 1
So 7481-20-1 is a valid CAS Registry Number.