21452-55-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21452-55-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,5 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21452-55:
(7*2)+(6*1)+(5*4)+(4*5)+(3*2)+(2*5)+(1*5)=81
81 % 10 = 1
So 21452-55-1 is a valid CAS Registry Number.