I have 2 chemicals, A & B. Note: both do not contain buffer salts.

Question

Chemical A expires 1 week later.
Chemical B expires next year.
I prepare solution C (general laboratory reagent)containing Chemicals A & B.
When assigning the expiry date of solution C, does this mean the expiry date should not exceed 1 week because Chemical A expires l week later?

Please help. Thanks.

Answer 1

My personal opinion is that you don't know. Part of the answer depends upon how chemical A decomposes and part depends upon the makeup of chemical C.