What is a suitable method of dissolving salicylic acid for large a volume to use it in the field?

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Heshmat Soliman Aldesuquy

Accurately weighed (0.3 g) salicylic acid bulk sample was dissolved in 50 ml of ethanol (95%)

Saad Gadalla

ok, but when i added a water to reach the final concentration, the SA was aggregate on the top of water

You should dissolve the weighted amount of SA completely in ethanol.