Red Phosphorus for High-Tech and Flame-Retardant Applications
High-purity phosphorus for safety and innovation.
Nagase delivers red phosphorus in electronic and industrial grades for flame retardants, semiconductor doping, and specialized materials.
Safe and Effective Red Phosphorus for Industrial Use
Red phosphorus is a stable, non-volatile allotrope valued for its controlled reactivity and safe handling characteristics. It is widely used in semiconductor production, flame retardant systems, and specialty material synthesis. Thanks to its high purity and consistent particle morphology, red phosphorus is suitable for ignition compounds, vapor-phase doping, and advanced chemical applications, especially where volatile white phosphorus is not appropriate.
As a trusted global supplier, NAGASE provides red phosphorus in high-purity grades, supporting regulatory compliance, safe packaging, and reliable availability for critical applications.
Chemical Formula: P4
Molecular Weight: 123.89
Physical & Chemical Properties:
It is the allotrope of White Phosphorus and appears as bronzing amorphorus powder or bulk solid.
Density: 2.34 g/cm3
Melting Point: 590 °C
Ignition Point: >200 °C
Solubility:
- Insoluble in water, carbon disulfide and organic solvents
- Slightly soluble in dry ethanol
Applications
Red phosphorus is used in high-purity applications ranging from flame retardancy to semiconductor doping and pyrotechnics.
- Flame retardants for plastics, electronics, and building materials
- Phosphorus source for compound semiconductors – e.g. Indium Phosphide (InP) and Gallium Phosphide (GaP)
- Solid phosphorus source for doping and ion implantation in silicon-based solar cells
- Wafer-level processing in advanced semiconductor manufacturing
- Chemical intermediates and reactive phosphorus compound synthesis
- Pyrotechnics and safety matches (regulated use only)
Features
Red phosphorus combines high purity, safe handling, and regulatory compliance for use in advanced materials and electronics manufacturing.
- High-purity red phosphorus – Custom grades available for industrial and electronic use
- Stable and non-volatile under ambient storage and handling conditions
- Low heavy metal content for sensitive formulations and doping processes
- Available as powder or granules to suit various production needs
- Compliant with international safety and transport regulations
Product Specification
| Item | Grade/99.9999%（6N） | Item | Grade/99.9999%（6N） |
|---|---|---|---|
| Spec value/ppb | Spec value/ppb | ||
| Al | <100 | Mo | <5 |
| As | <50 | Na | <100 |
| Ag | <10 | Ni | <20 |
| Au | <10 | Pb | <20 |
| Ba | <10 | Sb | <20 |
| Bi | <10 | Sn | <50 |
| Ca | <100 | Sr | <5 |
| Cd | <5 | Ti | <10 |
| Co | <5 | Zn | <30 |
| Cr | <10 | Ga | <100 |
| Cu | <15 | Ge | <100 |
| Fe | <100 | Pd | <100 |
| Hg | <10 | Se | <100 |
| In | <5 | Te | <100 |
| K | <100 | V | <100 |
| Li | <10 | B | <100 |
| Mg | <100 | Si | <500 |
| Mn | <20 | S | <200 |
Packaging Size
Inner packaging: high purity PP Bottle
Outer packaging: Outer carton (Domestic); Metal drum (Export)
Net weight: 500 g, 1000 g (granularity: 5-20 mm)
Frequently Asked Questions about Red Phosphorus
What is red phosphorus used for?
Red phosphorus is used in flame retardants, semiconductor doping, chemical synthesis, and controlled pyrotechnic applications such as safety matches.
How does red phosphorus differ from white phosphorus?
Unlike white phosphorus, red phosphorus is non-volatile, more stable at room temperature, and significantly safer to handle and transport.
Is red phosphorus suitable for semiconductor applications?
Yes, high-purity red phosphorus is used as a solid doping source for compound semiconductors and silicon-based devices in wafer-level processing.
In what forms is red phosphorus available?
It is typically available in powder or granule form, depending on application needs and handling requirements.
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