54957-81-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54957-81-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,9,5 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 54957-81:
(7*5)+(6*4)+(5*9)+(4*5)+(3*7)+(2*8)+(1*1)=162
162 % 10 = 2
So 54957-81-2 is a valid CAS Registry Number.