I am updating my response to this in light of new information.
For the past few months, I have been conducting several studies on Sunburst Ant Nectar in order to improve the formulation, manufacturing process, and label guidance. In this time, I have learned a lot about the chemistry of alkaline aqueous solutions.
A key phagostimulant in Sunburst Ant Nectar is a strong base, such as sodium hydroxide or potassium hydroxide. These strong bases dissociate in aqueous solutions into their respective Na- or K- ions and OH- ions. Carbon dioxide in regular air interacts with water to form a weak and unstable acid, OC(OH)2, which then reacts with the dissociated, unstable (-) ions present in order to form carbonates and bicarbonates, neither of which are harmful, but are indicative of qualitative changes in chemistry with respect to the reaction with CO2. Because these byproducts are poorly soluble in this saturated sugar water solution, they precipitate out of solution and present as faint turbidity (cloudiness) after reaching a certain threshold.
This visible change also corresponds with a decrease in pH, which, if allowed to drop to low enough levels, can allow the solution to become more susceptible to the growth of certain organisms. However, it is important to note that cloudiness alone is not indicative of a drop in pH to unsuitable levels, as non-uniform mixing of ingredients during filling may possibly account for some bottles being more susceptible to cloudiness even with small and insignificant pH changes. This will be addressed in future batches.
The tentative guidance for storage and care of Sunburst Ant Nectar is as follows:
Product quality diminishes rapidly with exposure to air. Keep bottle tightly closed at all times. Shake well before use. Do not add contaminated fluid to bottle contents. Best if used within 6 months after opening.
This guidance may change as I complete my study, which I may publish at some point.
Edited by drtrmiller, February 28 2018 - 12:08 AM.