Storage life of citiric acid?

[caroline7758]

Just made my first batch of elderflower cordial of the year, but realised the partially- used tub of citric acid (just enough for a batch) had a use by date of January '16. I've used it anyway but just wondered if anyone knows how long it will keep (it's in a plastic airtight tub).

[caroline7758]

[Pescador]

If it's in solid/crystalised form it will last for eons.

[tricia]

I have had a half used container in my cupboard for several years and still use it as and when called for.

Tricia 

[Digeroo]

Does it have a use by date or a best before?

[BarriedaleNick]

It will be fine - it keeps for years esp if it is airtight and room temp.

[caroline7758]

Does it have a use by date or a best before?

See above! :)