毒性
A finely powdered hydrous
magnesium silicate. It is used in a variety of industrial processes
and products, including rubber, paints, lubricants, insulating materials, cosmetics, and toiletries, such as baby and dusting powders.
Acute inhalation of large quantities of talc, such as infants aspirating a massive amount of powder, has caused death within hours
because of drying of the mucous membranes, clogging of the
smaller airways, pulmonary edema and pneumonia. Chronic inhalation of talc, such as occurs in talc miners, leads to talcosis (a
pneumoconiosis) involving pulmonary fibrosis and pleural sclerosis. Lymph nodes can also be affected. There are suggestions that
talc can result in cervical or ovarian cancer although evidence for
this is not extensive. Some talc is contaminated with asbestos.
编辑结构
