20387-28-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20387-28-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,3,8 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20387-28:
(7*2)+(6*0)+(5*3)+(4*8)+(3*7)+(2*2)+(1*8)=94
94 % 10 = 4
So 20387-28-4 is a valid CAS Registry Number.