Ozone is a reactive molecule of oxygen atoms. Many older photocopiers and other electrical equipment generate high indoor levels of ozone. Collections should not be stored or displayed near this electrical equipment. Insecticides and other chemicals. Determining potential damage to a collection is difficult.
Many factors impact the rate of damage.
Human health risks to toxins are determined by dose, which is chemical concentration and exposure time. But a particular object's sensitivity is complex. The combination of these factors can have a wide range of effects on objects. An entire collection could be destroyed. Or no damage could occur.