you should toss them in an envelope to me nah, they should be fine. They are non-oxidizing chemicals to begin with, and well sealed to boot. might have lost a small bit of potency, but not much
Did you have them stored in a cool and dark environment?
If anything, they should still very much be good. Compound degradation occurs at a fairly insidious level unless environmental factors are grossly abnormal in the area of their keeping.
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