21401-52-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21401-52-5 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 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21401-52:
(7*2)+(6*1)+(5*4)+(4*0)+(3*1)+(2*5)+(1*2)=55
55 % 10 = 5
So 21401-52-5 is a valid CAS Registry Number.