国产精品无码av在线_免费欧美黄色福利网站_国产三级无码一区二区三区_无码av免费线播放

96%powder Paraformaldehyde is mainly used in the manufacture of various synthetic resins and adhesives, and also used in the production of fumigants, fungicides and insecticides.

First, the harm of polyformaldehyde to health:

Invasion route: inhalation, ingestion, percutaneous absorption.Paraformaldehyde is strongly irritating to respiratory tract, causing rhinitis, pharyngitis, pneumonia and pulmonary edema.It can sensitize the respiratory tract.Direct eye contact can cause burns.Irritating to the skin, causing skin redness and swelling.Oral administration strongly irritates the skin and causes dryness, chapping and desquaking after long-term repeated contact.

Dangerous characteristics of paraformaldehyde: in case of open flame, high heat or contact with oxidant, there is a risk of combustion.Decomposition by heat gives off flammable gases which can form explosive mixtures with air.Powder and air can form an explosive mixture, when it reaches a certain concentration, it will explode when it meets Mars.