Several embodiments of the present invention provide a container (10) for housing a photosensitive APA compound therein, the container including an outer casing (12), an inner casing (18) disposed within the interior of the outer casing (12), the inner casing (18) configured to house the photo-sensitive APA compound therein, and a viewing window (14) formed through the outer casing (12) to permit viewing of the inner casing (18) from the outside of the outer casing (12), the viewing window (14) including a light-protecting material.
