42371-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42371-89-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,3,7 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 42371-89:
(7*4)+(6*2)+(5*3)+(4*7)+(3*1)+(2*8)+(1*9)=111
111 % 10 = 1
So 42371-89-1 is a valid CAS Registry Number.