Phosphorus Pentoxide, Phosphoric Anhydride, Diphosphorus Pentoxide, 1314-56-3

PHOSPHORUS PENTOXIDE (P₂O₅)

1. PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY

Short Identity Section

Detailed Identification

Description:
Phosphorus Pentoxide (P₂O₅) is a white crystalline powder with high purity and strong hygroscopic and dehydrating properties. It reacts with water, releasing a large amount of heat and sequentially forming metaphosphoric acid, pyrophosphoric acid, and ultimately phosphoric acid. Due to its extremely high moisture absorption capacity, it is widely used in gas and liquid drying applications. It is also an important raw material in the production of high-purity phosphoric acid, organic synthesis reactions, and organophosphorus compounds.

2. PHYSICAL AND CHEMICAL PROPERTIES

Note: Values are typical and may vary by source and production batch.

3. SOLUBILITY PROFILE

Note: P₂O₅ reacts violently with water to form phosphoric acid.

4. CHEMICAL PROPERTIES AND REACTIONS

Incompatibilities

• Water (violent exothermic reaction)

• Strong bases

• Organic materials (fire risk)

• Active metals

Chemical Reactions

• Hydrolysis: Reacts with water to form phosphoric acid (exothermic).

• Dehydration: Withdraws water from organic compounds, providing dehydration.

5. SPECIFICATIONS

Packaging Options

6. APPLICATIONS AND INDUSTRIAL USES

6.1 Primary Application Areas

6.2 Key Advantages

• Very high drying capacity.

• High purity level.

• Low metal and impurity content.

• Wide range of industrial applications.

• Provides high yield in organic syntheses.

• Important intermediate in the production of phosphorus-based chemicals.

7. BIOLOGICAL AND STRUCTURAL PROPERTIES

Note: This product is an industrial chemical raw material. It is not intended for biological, pharmaceutical, or food applications.

8. BIOCHEMICAL APPLICATIONS

Note: Not applicable for this industrial chemical raw material.

9. SAFETY AND TOXICOLOGY

9.1 Acute Toxicity

9.2 Chronic Toxicity

9.3 GHS Classification

Note: GHS classification is based on the ECHA harmonized classification and manufacturer SDSs.

9.4 Precautionary Statements

9.5 Safety Precautions and PPE

Hazards:

• Causes severe skin burns and serious eye damage

• Fatal if inhaled

• Reacts violently with water

PPE (recommended):

• Chemical-resistant gloves

• Safety goggles or face shield

• Chemical protective work clothing

• Appropriate respiratory protection in dusty environments

9.6 Environmental Fate

10. TRANSPORT INFORMATION

Note: Transport classification is UN 1807, Class 8, Packing Group II.

11. REGULATORY INFORMATION

Note: P₂O₅ is registered under REACH with EC number 215-236-1.

12. STORAGE AND HANDLING

13. FIREFIGHTING MEASURES

Note: Avoid using water in case of fire; reacts violently with water.

14. ACCIDENTAL RELEASE MEASURES

15. FIRST AID MEASURES

Note: P₂O₅ is corrosive and toxic. Immediate flushing with water is essential for skin and eye contact.

16. RAW MATERIALS AND DOWNSTREAM PRODUCTS

16.1 Raw Materials (Upstream)

16.2 Downstream Products

17. SECTORAL SUITABILITY AND USAGE LEVELS

18. CARBON DIOXIDE ABSORPTION AND REAGENTS

Not applicable. P₂O₅ is an industrial chemical raw material and is not used for CO₂ absorption or as a chemical reagent.

19. DERIVATIVES AND RELATED COMPOUNDS

20. SUMMARY AND CRITICAL WARNINGS

SUMMARY

Phosphorus Pentoxide (P₂O₅) is a white crystalline powder with high purity and strong hygroscopic and dehydrating properties. It reacts with water, releasing a large amount of heat and sequentially forming metaphosphoric acid, pyrophosphoric acid, and ultimately phosphoric acid. Due to its extremely high moisture absorption capacity, it is widely used in gas and liquid drying applications. It is also an important raw material in the production of high-purity phosphoric acid, organic synthesis reactions, and organophosphorus compounds.

It appears as a white powder. Its P₂O₅ content is ≥99.5%, density is 2.30–2.39 g/cm³, melting point is 340 °C, boiling point is 360 °C (sublimes), and molecular weight is 141.94 g/mol.

Key Properties

Main Application Areas

Key Safety Points

• CORROSIVE: Causes severe skin burns and serious eye damage (H314, H318).

• FATAL IF INHALED: Fatal if inhaled (H330).

• REACTS VIOLENTLY WITH WATER: Reacts violently with water (EUH014).

• PPE REQUIRED: Use chemical-resistant gloves, safety goggles/face shield, protective clothing, and respiratory protection.

• STORAGE: Store in a dry and well-ventilated area, protected from moisture. Keep containers tightly closed.

• DISPOSAL: Dispose of according to local regulations.

Critical Warnings

• P₂O₅ reacts violently with water; never allow contact with water.

• It is corrosive and toxic; avoid contact with skin, eyes, and respiratory tract.

• May pose a fire risk upon contact with organic materials.

• This TDS contains completed toxicological, transport, firefighting, and first aid data, but always refer to the supplier's official SDS/MSDS.

• Do not use this TDS as a substitute for the official SDS/MSDS.

• Users are responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements.

Disclaimer:
This Technical Data Sheet (TDS) is for informational purposes only. The information provided is based on the original source document, verified CAS/EC numbers, and data completed from reliable sources (ICSC, ECHA, manufacturer SDSs). However, the user is solely responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements. For complete safety, handling, storage, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Users are responsible for testing the product in their own processes and applications. All local, national, and international regulations must be followed when working with Phosphorus Pentoxide (P₂O₅).