Inorganic Phosphorous Acid CAS 10294-56-1 13598-36-2 With Strong Hygroscopicity

Basic Information
Place of Origin: CHINA
Brand Name: MOSINTER
Certification: COA
Model Number: Water Purification Chemicals - 6
Minimum Order Quantity: 25KGS
Price: Negotiation
Packaging Details: 25kg/bag or 50kg/bag or as required
Delivery Time: Within 7 days
Payment Terms: L/C, T/T
Supply Ability: 500 MTS/month
Detail Information
Name: Phosphorous Acid CAS: 10294-56-1 13598-36-2
Form: Powder Molecular Formula: H3PO3
Molecular Weight: 81.9957 EINECS No: 237-066-7
High Light:

water treatment chemicals


chemicals used to purify water

Product Description

Phosphorous acid CAS 10294-56-1 13598-36-2 Water Purification Chemicals




Phosphorous acid is a kind of inorganic compounds, its chemical formula is H3PO3, molecular weight of 82.00.Soluble in water and alcohol.Slow oxidation into phosphoric acid in the air, heated to 180 ℃ when broken down into phosphoric acid and phosphine (highly toxic, explosive).Phosphorous acid is dibasic acid, which is slightly more acidic than phosphoric acid. It has strong reducibility and is easy to reduce silver ion (Ag+) to silver metal (Ag). It can reduce sulfuric acid to sulfur dioxide.Have strong hygroscopicity and deliquescence, corrosive.



Index Index
Main content(based on H3PO3)
99% min
Chloride (Cl)
Iron (Fe)
0.005% max.
Sulphate (SO4)
0.001% max.
Phosphate (PO4)
0.3% max.
White Crystal
White Crystal
Without smell
Without smell




The most important use of phosphorous acid is the production of phosphonates which are used in water treatment. Phosphorous acid is also used for preparing phosphite salts, such as potassium phosphite. These salts, as well as aqueous solutions of pure phosphorous acid, have shown effectiveness in controlling a variety of microbial plant diseases, in particular, treatment using either trunk injection or foliar containing phosphorous acid salts is indicated in response to infections by phytophthora and pythium-type plant pathogens (both within class oomycetes, known as water molds), such as dieback/root rot and downy mildew. Anti-microbial products containing salts of phosphorous acid are marketed in Australia as 'Yates Anti-Rot'; and in the United States of America, for example, aluminum salts of the monoethyl ester of phosphorous acid (known generically as 'Fosetyl-Al') are sold under the trade name 'Aliette'. Phosphorous acid and its salts, unlike phosphoric acid, are somewhat toxic and should be handled carefully.


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