Best Selling Phosphorous Acid, Fast Delivery, ISO Certified CAS No. 13598-36-2

1. Description :
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3. 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.
4. Phosphorous acid will be slowly oxidized into orthophosphate in the air, and will decompose into orthophosphate and phosphine when heated to 180 ℃ .

5. 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.

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Inspection item	Technical index	Inspection result
Appearance	White flake	White flake
Phosphorous acid(H3PO3),%≥	≥97%	98.34%
Iron ion(Fe),PPM≤	≤20PPM	19.87PPM
Phosphate(PO4),%≤	≤0.6%	0.2%
Sulfate(S04),%≤	≤0.008%	0.0075%

1. Specification:

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1. Packing ：

25kg/bag , 500kg/bag , 1MT/bag