We have correlations for Apologia, RSK4, CK-12, Chang, and Holt. We didn't do correlations for BJU or A Beka. Both of those are rigorous. We expected that many homeschool families would be using one of those texts, either of which is pretty straightforward to correlate with our lab sessions. We don't have a correlation for Wyle. IIRC, Wyle is even less rigorous than Apologia. My opinion is that brighter students are far better off doing BJU or A Beka than Wyle (or Apologia).
As to shelf life, yes many/most of the chemicals will still be usable, assuming you kept them tightly capped in a cool, dark place. Those prone to outgassing (like sodium sulfite and hydrochloric acid) may be less concentrated than nominal, but that shouldn't be a problem.