Specification parameters

Essential information

Produced by the combustion of phosphorus in oxygen, with the chemical formula P2O5. White amorphous powder or hexagonal crystal. Highly hygroscopic. Sublimation at 300 ℃. Not burning. Dissolving in water generates a large amount of heat and produces phosphoric acid, which reacts with ethanol similarly to water. The relative density is 2.30. Melting point 340 ℃. Acidic oxides are corrosive and should not be touched or consumed directly by hand, nor smelled directly.

Application area 

Used as a desiccant for gases and liquids; Dehydrating agent for organic synthesis, anti-static agent for polyester resin, refining agent for drugs and sugars. It is the raw material for producing high-purity phosphoric acid, phosphate, phosphides, and phosphate esters. It can also be used for the production of pentoxide phosphorus sol and H-type aerosols. Used for manufacturing optical glass, UV transparent glass, heat-insulating glass, microcrystalline glass, and opaque glass to improve the dispersion coefficient and UV transmittance of the glass. Used as a desiccant, dehydrating agent, refining agent for sugar, and for the production of phosphoric acid, phosphorus compounds, and aerosols. It is also used as a doping source for semiconductor silicon, dehydrating desiccant, organic synthesis condensing agent, and surfactant. In junior high school chemistry, it is often used to test the mass fraction of oxygen in the air.

Packaging, Storage, Transportation, and Safety
Hazard Overview

Invasion routes: inhalation, ingestion, transdermal absorption
Health hazards: Poisoning symptoms are similar to yellow phosphorus. Acute poisoning: Oral ingestion: Within a few hours of the toxin entering, nausea, vomiting, abdominal pain, and diarrhea may occur. Within a few days, jaundice and liver enlargement may occur, or acute liver necrosis may occur. In the most severe cases, within a few hours, the patient may transition from excitement to inhibition, become unconscious, experience circulatory failure, and ultimately die. Inhalation: Mild patients may experience headaches, dizziness, vomiting, and general weakness, while moderate patients may have more severe symptoms such as upper abdominal pain, fast pulse, and low blood pressure; Severe poisoning causes acute liver necrosis and coma. Chronic poisoning: Symptoms include respiratory irritation, gastritis, hepatitis, anemia, osteoporosis, and necrosis.

Emergency measures

Skin contact: Wipe off the poison with soft paper or cotton as soon as possible, then soak in 3% sodium bicarbonate solution. Then rinse thoroughly with water. Seek medical attention. Remove and isolate contaminated clothing and shoes. For small amounts of skin contact, avoid spreading the substance over a larger area. Wipe off the solidified molten material on the skin under the guidance of a doctor. Pay attention to keeping the patient warm and quiet. Inhalation, ingestion, or skin contact with this substance can cause delayed reactions. Ensure that medical personnel understand the personal protective knowledge related to the substance and pay attention to self-protection.
Eye contact: Wipe off the poison with soft paper or cotton as soon as possible, and then rinse thoroughly with water. Seek medical attention.
Inhalation: Quickly leave the scene and move to a place with fresh air. If necessary, perform artificial respiration. Seek medical attention. If breathing is difficult, administer oxygen. If the patient ingests or inhales the substance, do not perform mouth to mouth artificial respiration. A small one-way valve respirator or other appropriate medical respirator can be used.
Ingestion: If ingested by mistake, rinse mouth immediately and drink milk or egg white. Seek medical attention.

Fire protection measures

Fire extinguishing methods: sand, dry powder. Do not use water. If the substance or contaminated fluid enters the waterway, notify downstream users with potential water pollution, local health and fire officials, and pollution control departments. Use mist water to cool exposed containers beyond the safe explosion-proof distance.

Emergency response to leakage

Emergency response: Isolate the contaminated area of the leak, set up warning signs around it, and suggest that emergency personnel wear gas masks and chemical protective clothing. Do not directly contact the leaked material, do not let the leaked material come into contact with flammable substances (wood, paper, oil, etc.), do not spray water directly on the leaked material, and do not let water enter the packaging container. Carefully sweep it up, add a small amount of water, adjust it to neutral, and then put it into the waste water system. If there is a large amount of leakage, clean it up under the guidance of technical personnel.

Handling and Storage

Storage precautions: Store in a dry and clean warehouse. Maintain relative humidity below 75%. Stay away from sources of fire and heat. The packaging must be sealed to prevent moisture. It should be stored separately from flammable, combustible, and alkaline materials. Do not mix storage and transportation. Attention should be paid to personal protection during packaging and handling operations. Handle with care during transportation to prevent damage to packaging and containers. It is not suitable for transportation on rainy days. Disposal: Refer to relevant national and local regulations before disposal. Dispose of it using safe burial method. Packaging method: Plastic bag, multi-layer kraft paper bag, fully open steel drum outside; Plastic bags, multi-layer kraft paper outer wooden box; Screw mouth glass bottles, plastic bottles, composite plastic bottles, and lead bottles in calcium plastic boxes; Glass bottles, plastic bottles, composite plastic bottles, lead bottles with corrugated cardboard boxes.