457643-81-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 457643-81-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,5,7,6,4 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 457643-81:
(8*4)+(7*5)+(6*7)+(5*6)+(4*4)+(3*3)+(2*8)+(1*1)=181
181 % 10 = 1
So 457643-81-1 is a valid CAS Registry Number.