Use the appliance only for its intended purpose. Household chemicals, flammable substances and unsuitable containers should not be stored with food or assumed safe in a domestic freezer.
What the observation tells you
A cold environment does not neutralise hazards or prevent contamination. Labels and packaging for chemicals may specify conditions incompatible with the appliance. Food-contact surfaces can also become contaminated even if a container appears closed.
A useful next step
Follow the chemical's safety and storage requirements through an appropriate separate arrangement. If a spill has occurred inside the freezer, obtain suitable professional advice before returning it to food use.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.