21053-71-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21053-71-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,5 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21053-71:
(7*2)+(6*1)+(5*0)+(4*5)+(3*3)+(2*7)+(1*1)=64
64 % 10 = 4
So 21053-71-4 is a valid CAS Registry Number.