Old chemicals - throw out?

[Reefer Dan]

These chemicals came with my used aquarium purchase, my gut tells me to toss them, but I wanted to check first.
These have no expiration dates that I can find.. and the bottles are yellowing, no idea when they were purchased. Keep or toss?

thanks!

 

[Tahoe61]

Toss.

 

[Reefer Dan]

Thanks!