A long before these reagents expire?

[gib65]

Hello,

I've got 3 reagent tests: Mecke, Simon, and Marquis. I keep them in a relatively cool and dark spot. Does anyone know how long before they expire?

 

[Fridolin]

I think I've read somewhere that it's 2 years.

 

[gib65]

Time to get a new kit then. Thanks.