42989-56-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42989-56-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,8 and 9 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 42989-56:
(7*4)+(6*2)+(5*9)+(4*8)+(3*9)+(2*5)+(1*6)=160
160 % 10 = 0
So 42989-56-0 is a valid CAS Registry Number.