21404-87-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21404-87-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,0 and 4 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21404-87:
(7*2)+(6*1)+(5*4)+(4*0)+(3*4)+(2*8)+(1*7)=75
75 % 10 = 5
So 21404-87-5 is a valid CAS Registry Number.