Is my DPD powder still ok?

[PoolCleanerMom]

all right, I knew keeping my test kit in the shed during the winter wasn't a good idea, but I did, and somehow my container of DPD powder got enough moisture in it (lid was open for an unknown amount of time) and now it's just a solid chunk instead of powder. Is it still usable and if so, any hints on how to break it up?

 

[JasonLion]

The powder generally survives bad treatment better than the titrant. You need to grind it back down with a mortar and pestle.

 

[FamilyGuy]

Yeah if you break it up it will be useable. Try a flat head screwdriver and scrape it out onto a plate then crush it back to powder and pour it back in the container

 

[PoolCleanerMom]

Thanks!