Oxalic Acid

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storing OA syrup

according to the BBKA leaflet:

"The solution has a short shelf life once mixed with sugar because the HMF
level in the solution rises and can become toxic to bees. Our advice is to
use the solution once in winter and then safely dispose of the remainder
down the drain. The solution remains effective longer if it is kept out of the
light and at low temperatures (say less than 10°C) but do not try to store for
more than 6 months."
 

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