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Red Phosphorus

  • Red Phosphorus
  • Red Phosphorus
  • Red Phosphorus
  • Red Phosphorus

Red Phosphorus

Red Phosphorus is a stable, non-toxic phosphorus variant, ideal for flame retardants in plastics/rubbers, with high thermal stability—key for electronics, construction, and automotive safety materials.
Tél : +86 18596277178
Tél : +86 15588955913
Tél : +86 17663494691
WhatsApp : +86 18866832776
Email : victoria@juntengchem.com

Paramètres du Produit

CAS7723-14-0
EINECS231-768-7
Molecular FormulaP₄
Molecular Weight30.97
Package50kg iron drums or client's request

Propriétés de Base

Physical Properties

  • Appearance and Morphology: Red phosphorus is a purplish-red or slightly brownish amorphous powder, sometimes appearing as crystals. It lacks a distinct luster and is significantly different from the waxy solid form of white phosphorus.

  • Density and Melting Point: Its density is approximately 2.34 g/cm³, much greater than that of white phosphorus (1.82 g/cm³). Its melting point is not fixed; it sublimes at around 430℃, but melts into a liquid state when heated to 590℃ under high pressure.

  • Solubility: It is insoluble in common solvents such as water, ethanol, and carbon disulfide, a significant difference from white phosphorus, which is readily soluble in carbon disulfide.

  • Electrical Conductivity: It is a semiconductor, exhibiting weak conductivity at room temperature, which increases with increasing temperature.


Chemical Properties

  • Stability: Red phosphorus is much more chemically stable than white phosphorus. It does not readily oxidize in air at room temperature and does not spontaneously combust like white phosphorus (whose auto-ignition point is approximately 30℃), while red phosphorus has an auto-ignition point as high as 240℃.

  • Combustibility: Red phosphorus is combustible when heated to above 240℃ or in contact with strong oxidizing agents, producing phosphorus pentoxide (P₂O₅). The reaction equation is: 4P + 5O₂ → 2P₂O₅, producing white smoke during combustion.

  • Reducing Properties: Red phosphorus has certain reducing properties and can react with strong oxidizing substances (such as nitric acid and chlorine). For example, when heated with concentrated nitric acid, it will be oxidized to phosphoric acid, simultaneously producing nitrogen dioxide gas.

  • Reaction with Halogens: Under heating conditions, red phosphorus can react with halogen elements such as chlorine and bromine to produce corresponding phosphorus halide compounds, such as phosphorus trichloride (PCl₃) and phosphorus pentachloride (PCl₅).

Applications Principales

1. Flame Retardant Applications

  • This is the core industrial application of red phosphorus. Red phosphorus itself possesses excellent flame-retardant properties. At high temperatures, it decomposes to produce substances such as phosphoric acid and metaphosphoric acid. These substances can coat the surface of materials, forming a flame-retardant barrier while inhibiting the generation of flammable gases and interrupting the chain reaction of combustion.

  • It is commonly used for flame retardant applications in polymer materials, such as polyethylene, polypropylene, polyurethane, epoxy resin, and other plastics and rubber products. It can be used to manufacture flame-retardant wire and cable sheaths, building insulation materials, automotive interior parts, and electronic appliance housings. It can also be compounded with aluminum hydroxide, magnesium hydroxide, etc., to form composite flame retardants, improving flame-retardant effects and reducing costs.

2. Safety Match Manufacturing

  • Red phosphorus is a key raw material for the side coating of safety match boxes. The side coating of traditional safety matches is mixed with red phosphorus, antimony trisulfide, and adhesives. When the match head (containing oxidizers such as potassium chlorate) is rubbed against the side of the box, the red phosphorus is ignited first, triggering the combustion of the match head. Because its auto-ignition point is much higher than that of white phosphorus, it significantly improves the safety of the matches.

3. Chemical Synthesis Intermediates

  • Phosphate Preparation: Under heating conditions, red phosphorus can react with metals (such as zinc, aluminum, and copper) to form corresponding metal phosphides. For example, zinc phosphide (Zn₃P₂) can be used to prepare rodenticides, and aluminum phosphide (AlP) is a commonly used fumigant insecticide that releases phosphine gas for pest and rodent control in storage.

  • Organic Synthesis: Red phosphorus can act as a reducing agent in organic synthesis reactions, such as in the reductive dehalogenation of certain halogenated hydrocarbons. It can also be used to prepare phosphorus-containing organic intermediates, providing raw materials for the synthesis of pesticides, pharmaceuticals, and other products.

4. Semiconductor and Electronics Industry

  • Red phosphorus possesses semiconductor properties and can be used as a semiconductor dopant to adjust the conductivity of semiconductor materials, finding applications in the production of some low-end semiconductor components. Furthermore, it can be used to prepare flame-retardant packaging materials for electronic components, improving the fire resistance reliability of electronic devices.

5. Other Industrial Applications

  • Fireworks and Signal Flares: Red phosphorus produces bright white smoke and a certain luminous effect when burned, which can be used to manufacture smoke bombs, signal flares, etc., for signal transmission or smoke masking in military exercises, emergency rescue, and other scenarios.

  • Water Treatment: Small amounts of red phosphorus can be used to prepare specific water treatment agents to remove certain heavy metal ions from water bodies; however, this application is relatively limited due to environmental restrictions.


Précautions de Sécurité

Safety Precautions:

  • Operating Protective Measures: Operators must wear dust masks, protective goggles, acid and alkali resistant gloves, and flame-retardant work clothes to prevent inhalation of red phosphorus dust, skin contact, or eye contact. The work area must be well-ventilated, and dust collection devices must be installed to prevent dust accumulation in the air.

  • Prohibited Activities: Smoking and open flames are strictly prohibited during operation. Do not strike the red phosphorus packaging or equipment with iron objects to prevent sparks from igniting the red phosphorus. Avoid prolonged contact between red phosphorus and skin; if accidental contact occurs, rinse immediately with water.

  • Emergency Control: In case of a small leak, cover and collect with dry sand or inert material, place in a sealed container, and dispose of properly. Do not rinse with water (red phosphorus is insoluble in water, but the dust easily clumps when wet, potentially increasing cleanup difficulty). In case of a large-scale leak, isolate the leak area, evacuate personnel, and contact a professional emergency response team.


Fire and Explosion Emergency Response

  • Firefighting Methods: When red phosphorus is burning, use dry powder fire extinguishers or sand to extinguish the fire. Water or foam fire extinguishers are strictly prohibited (the phosphorus pentoxide produced by red phosphorus combustion reacts with water to form corrosive phosphoric acid, and water flow may cause the fire to spread).

  • Explosion Prevention: When red phosphorus dust reaches a certain concentration in the air (lower explosive limit is approximately 48 g/m³), it can cause a dust explosion upon contact with an open flame. Therefore, dust concentration in the work area must be controlled, dust must be cleaned regularly, and equipment must be grounded to eliminate static electricity.

Profil de l'Entreprise

Junteng Chemical est une entreprise professionnelle de commerce de matières premières chimiques, dédiée à fournir aux clients des services d'approvisionnement tout-en-un. Grâce à une gestion rigoureuse des fournisseurs, de la chaîne d'approvisionnement et du service après-vente, l'entreprise garantit que la qualité des produits, leur transport et leur utilisation répondent aux besoins des clients. De plus, l'équipe technique de l'entreprise propose gratuitement des solutions sur mesure et des services de support.

 

L'entreprise intervient dans les secteurs pharmaceutique, des pesticides, pétrochimique, de la construction, des additifs alimentaires, du traitement des eaux usées, des adhésifs, des encres, des peintures, des revêtements, de la transformation des plastiques et du caoutchouc, des matières premières pour détergents, des engrais et des usines textiles, entre autres. Junteng Chemical s'approvisionne en produits de qualité stable et fiable, collaborant avec des entreprises nationales et internationales telles que Luxi Group, Weiyuan Chemical, Qilu Petrochemical, Dongying Lihuayi, Yanshan Petrochemical, Sinopec, Shijiazhuang Refinery, Qingdao Petrochemical, Sailboat, Dow Chemical, BASF, ainsi que des entreprises de Corée, de Taïwan et d'Arabie saoudite. Notre approvisionnement stable, la qualité supérieure de nos produits et notre logistique mature nous ont valu une large clientèle. Nous espérons collaborer avec vous tous pour un avenir mutuellement bénéfique.

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Avantages de l'Entreprise

1

Plateforme d'Approvisionnement
Tout-en-Un

Nous intégrons les ressources dans toutes les catégories de produits, y compris les solvants organiques, les résines et caoutchoucs, et les produits chimiques inorganiques, et contrôlons strictement les fournisseurs, les chaînes d'approvisionnement et les processus après-vente pour garantir une qualité stable, un transport efficace et une utilisation sans souci, simplifiant ainsi votre processus d'approvisionnement.

2

Équipe Professionnelle Renforcée par la Technique

Dotés d'une équipe technique expérimentée, nous fournissons gratuitement des solutions personnalisées et un support technique professionnel aux clients dans diverses industries, telles que la pharmaceutique, la pétrochimie, les peintures et encres, et le traitement des eaux usées, vous aidant à résoudre les problèmes et à améliorer l'efficacité.

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Sécurité de la Chaîne d'Approvisionnement Mondiale

Nous collaborons avec les plus grands géants chimiques nationaux et étrangers, tels que Luxi Group, Qilu Petrochemical, Sinopec, BASF d'Allemagne et Dow des États-Unis, pour établir un réseau d'approvisionnement de haute qualité stable et fiable et un système logistique mature afin d'assurer une livraison ponctuelle et sûre des
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Concept de Coopération Gagnant-Gagnant Profonde

Adhérant au concept d'« intégrité, action immédiate, professionnalisme, innovation et gagnant-gagnant » et prenant comme mission « la réussite du client et l'altruisme », nous nous engageons à établir des partenariats stratégiques à long terme et à créer un avenir meilleur grâce à des produits et services excellents.

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