Paraformaldehyde is a linear polymer made from formaldehyde that has the following properties:
Appearance and properties: white amorphous particles or powder, with formaldehyde taste.
Melting point: There is no fixed melting point, it will decompose when heated, and the melting point is between 120 and 170°C.
Solubility: easily soluble in hot water and release formaldehyde, slowly soluble in cold water, soluble in caustic soda and alkali metal carbonate solution, insoluble in alcohol and ether.
Chemical reactions: Reactions similar to formaldehyde can occur, such as chloromethylation and acetal formation with alcohols.
The application of Paraformaldehyde in synthetic resin
Urea-formaldehyde resin:
Used to synthesize urea-formaldehyde resin, a resin widely used in wood processing and building materials.
Phenolic resin:
Paraformaldehyde is also one of the raw materials for the manufacture of phenolic resin, which is used in a variety of industrial applications due to its thermal stability and mechanical strength.
Polyacetal resin:
Used to synthesize polyacetal resins, which have unique uses in applications that require stability at high temperatures.
Melamine resin:
Paraformaldehyde is involved in the synthesis of melamine resins, which are used as adhesives and sealants in the construction and automotive industries.
Ion exchange resin:
Used in the production of ion exchange resins, which play an important role in water treatment and wastewater treatment.
The application of Paraformaldehyde in adhesives
Synthetic resins and adhesives:
Used to produce a variety of synthetic resins, such as urea formaldehyde resins, phenolic resins, etc., which are further used to make various adhesives. These adhesives are widely used in furniture manufacturing, construction and packaging.
Coatings and inks:
Used to produce resins for paints and inks, enhancing the adhesion and durability of paints and inks.
Other applications:
In addition to its applications in adhesives and coatings, paraformaldehyde can also be used in other areas that require high-strength adhesives, such as textile finishing agents and metal surface treatment agents.
The application of Paraformaldehyde in agriculture
Bactericide:
Used as a component of a variety of fungicides, effectively used to control and prevent the growth of microorganisms, especially in the field of agriculture and health care has a wide range of applications.
Herbicides and pesticides:
Used in the manufacture of herbicides and pesticides, which play an important role in the protection of crops and the control of pests and diseases. Through effective bactericidal action, it helps reduce the incidence of crop diseases and improve crop yields.
The application of paraformaldehyde in disinfectants
Fumigation disinfectant:
When heated to 80~100℃, Paraformaldehyde can produce a large amount of formaldehyde gas, showing a strong bactericidal effect. This property makes paraformaldehyde suitable for disinfection in environments requiring high temperatures, such as fumigation in confined Spaces.
Medicine and Disinfection:
Used to disinfect pharmaceutical products, including pharmacies, clothing and bedding, to ensure that these items are clean and sterile.
Safety Information
Dangerous characteristics:
Paraformaldehyde is a flammable solid in Class 4.1 of the classification of hazardous chemicals and has a risk of burning when exposed to open fire, high heat or contact with oxidants.
Health hazards:
It is strongly irritating to the respiratory tract and can cause rhinitis, pharyngitis, pneumonia and pulmonary edema. It is also irritating to the eyes and skin and can cause burns and skin redness.
Emergency measures:
In case of skin contact, remove contaminated clothing immediately and rinse with plenty of running water for at least 15 minutes. In case of eye contact, lift eyelids and rinse with plenty of running water or saline for at least 15 minutes. When inhaling, quickly remove from the scene to a place with fresh air to keep the respiratory tract unobstructed.
Storage Conditions
Should be stored in a cool, ventilated warehouse, away from fire, heat sources. The temperature of the storage is not more than 32℃, and the relative humidity is not more than 80%.
It should be stored separately from oxidants, reducing agents, acids, alkalis and edible chemicals, and should not be mixed.
