21231-71-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21231-71-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,3 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21231-71:
(7*2)+(6*1)+(5*2)+(4*3)+(3*1)+(2*7)+(1*1)=60
60 % 10 = 0
So 21231-71-0 is a valid CAS Registry Number.