Q:what is Paraformaldehyde?

A:Paraformaldehyde is a polymer with the molecular formula (CH2O)n, a white amorphous powder with the odor of formaldehyde, and a linear polymer of formaldehyde. It has no fixed melting point and decomposes when heated. Melting point 120～170℃. Soluble in hot water and emit formaldehyde, slowly soluble in cold water, soluble in caustic alkali and alkali metal carbonate solution, insoluble in alcohol and ether, its high polymer insoluble in water. It can undergo formaldehyde-like reactions, such as chloromethylation, forming acetal with alcohol, etc. Used in synthetic resin, adhesive, medicine, fungicide, pesticide, disinfectant, etc.

Q:What is paraformaldehyde used for?

A:Paraformaldehyde is a white, crystalline (sand-like) solid with an odor of Formaldehyde.Paraformaldehyde is mainly used in the production and use of herbicides, and is also used in the production of synthetic resins (such as artificial horn products or artificial ivory) and adhesives. Paraformaldehyde is also used in the pharmaceutical industry (the active ingredient of contraceptive cream) and the disinfection of pharmacies, clothes and bedding, etc. Paraformaldehyde can also be used as a fumigant disinfectant, fungicide and insecticide. Low polymerization degree of paraformaldehyde instead of ordinary industrial formaldehyde aqueous solution, in the synthesis of pesticides, synthetic resins, coatings and fumigant disinfectant and a variety of formaldehyde downstream products, not only can reduce the energy consumption of dehydration, but also greatly reduce the amount of wastewater treatment, which is a green environmental protection project for the benefit of the country and the people. Paraformaldehyde is a high formaldehyde content of solid a wake, solid granular, easy to store and transport. It can be turned into methyl vapor at higher temperature, and it is easy to participate in various reactions instead of high concentration formaldehyde, which is beneficial to chemical and pharmaceutical chemical synthesis and other industrial applications, especially in the synthesis that requires anhydrous formaldehyde as raw material.

Q:Is paraformaldehyde toxic?

Paraformaldehyde is moderately toxic by skin contact. It has recently been designated as a probable human carcinogen. Skin contact with paraformaldehyde may cause itching and rash that may lead to skin allergy upon repeated exposure.

For acute inhalation poisoning, the patient should be quickly moved to fresh air, promptly remove contaminated clothing, thoroughly wash the contaminated skin with soapy water and plenty of water, and immediately flush with plenty of water if splashed in the eyes. Those with upper respiratory tract irritation should be observed for at least 48 hours to avoid aggravation of the disease after activity. Stay still, keep warm, and use reasonable oxygen therapy. Keep the airway open, give bronchial antispasmodics, and if necessary, perform tracheotomy. Early, adequate and short course use of glucocorticoids can effectively prevent laryngeal edema and pulmonary edema. After oral administration, a small gastric tube can be inserted cautiously for gastric lavage, which should be done gently to avoid aggravating the damage to the digestive tract. After gastric lavage, use 3% ammonium carbonate or 15% ammonium acetate 100ml solution into the stomach, which can make formaldehyde into less toxic hexylenetetetramine, which has a certain detoxification effect. Then take milk or soy milk or egg white orally to protect the gastric mucosa.

Q:How do you store paraformaldehyde?

When exposed to open flame, high heat or contact with oxidizer, there is a risk of combustion. Heat decomposition and release of flammable gas can form an explosive mixture with air. Powder and air can form an explosive mixture, when it reaches a certain concentration, it will explode when it meets a spark. It should be stored in a cool, ventilated warehouse. Keep away from fire and heat source. Packed and sealed. It should be stored separately from oxidizers, acids and alkalis, alcohols, and should not be mixed. Use explosion-proof lighting and ventilation facilities. Prohibit the use of spark-prone machinery and tools. The storage area should be equipped with suitable materials to shelter spills.