Phosphorous acid

Description :

Phosphorous acid is a type of phosphoric acid that can be used as a reducing agent in chemical analysis. Phosphorous acid is an inorganic compoun d with the formula H  3  PO  3  . It is a colorless to yellowish ice-like crystalline substance that is easily soluble in water and ethanol.

Phosphorous acid will be slowly oxidized into orthophosphate in the air, and will decompose into orthophosphate and phosphine when heated to 180  ℃  .

Nature:

Phosphonic acid is colorless to yellowish solid, soluble in water.

- It is a medium strong acid, taste acid, can react with metals to form the corresponding salt.

Phosphonic acid is a reducing substance that can be oxidized by oxidants.

- It is unstable in air and is easily oxidized to phosphoric acid by oxygen.

Purpose:

Phosphonic acid is used as an intermediate between reducing agents and oxidants in chemical synthesis.

- It is an important raw material for the preparation of polyphosphonates (polymers).

Phosphonic acid can also be used in the preparation of metal chemical reactions and catalysts.

Preparation:

Phosphonic acid can be obtained by the reduction of phosphoric acid.

A common way to prepare phosphonic acid is to react phosphoric acid with a reducing agent (such as phosphite).

Safety information:

Phosphonic acid is a corrosive substance that can cause pain and irritation when it comes into contact with skin and eyes. Direct contact with phosphonic acid must be avoided.

- Wear appropriate personal protective equipment such as protective gloves and goggles when using or handling phosphonic acid.

- During storage and handling, care should be taken to avoid contact with oxidizing agents or other flammable substances to avoid the risk of fire or explosion.

- If you ingest phosphonic acid or inhale its dust, seek medical advice immediately and bring packing to the hospital.

Applications:

The main uses of phosphorous acid include as a raw material for the manufacture of plastic stabilizers, and it is also used in the manufacture of synthetic fibers and phosphite. In addition, phosphorous acid is also an important chemical raw material and pesticide intermediate, which plays an important role in the production of a variety of materials, chemical additives and pesticides. Phosphorous acid is widely used in industry because of its high acidity, strong moisture absorption, strong reducibility and good metal ion complexation properties. For example, it can be used as a reducing agent, nylon antioxidant, water treatment agent, etc., and in the field of pesticides, phosphorous acid is used as an intermediate in herbicides, fungicides, organophosphorus pesticides, etc.

First aid measure

Skin contact: Immediately remove contaminated clothing and rinse with plenty of running water for at least 15 minutes. Seek medical attention.

Eye contact: Immediately lift eyelids and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Seek medical attention.

Inhalation: Quickly remove from the scene to fresh air. Keep your airway clear. Administer oxygen if breathing is difficult. If breathing stops, give artificial respiration immediately. Seek medical attention.

Ingestion: Gargle with water, drink milk or egg white. Seek medical attention.

Leakage emergency treatment

Isolate the contaminated area of leakage and restrict access. It is recommended that emergency personnel wear dust masks (full face masks) and acid and alkali protective overalls. Do not contact spills directly.

Small leakage: Collect in a dry, clean, covered container with a clean shovel. It can also be washed with a lot of water and diluted into the waste water system.

Large leakage: Collect and recycle or transport to a waste disposal site for disposal.