Company Profile
Wuhan Kangzheng science and Technology Co Ltd. was established in 2002. it's a export-oriented company,which is specialized in Fertilizers and Industrial Chemicals,especially Calcium Thiosulphate solution(CaTS), Potassium Thiosulphate solution(KTS), Ammonium Thiosulphate soulution(ATS)
,Ammonium Nitrate,UAN,APP,Ferrous Sulphate,etc. to Oceania,Asia,Europe,Africa,Middle East,North America,South America etc.have over years exporting experiences and have a great advantage of transportation.
We use high-quality materials,the production adopts intemational advanced technologies. Production line ranks among the world leading levels, its facility is high technical with superior product performance and high degree of automation.
Welcome customers, business associations and friends from all parts of the world to contact us and seek cooperation for mutual benefits,the development of friendly relations and cooperation for a better tomorrow!
Applications Properties
Phosphorous acid is a colorless crystal. It can be slowly oxidized to phosphoric acid in the air. When heated to 180 °C, it can be decomposed into phosphoric acid and phosphine (highly toxic). As a dibasic acid, it has slightly ber acidity than phosphoric acid. Phosphorous acid has b reducibility and can easily reduce Ag+ to metal silver. It can also reduce sulfuric acid to sulfur dioxide. It is corrosive and has b hygroscopicity.
Relative Density: 1.651 (21.1 °C)
Melting Point: 73.6 °C
Boiling Point: 200 °C (Decomposes)
Solubility: Easily soluble in water and alcohol.
Phosphorous acid is mainly used in the production of phosphates, synthetic fibers and organophosphorus pesticides, etc.. It is also used in producing high performance water treating agent ATMP.
Phosphorous acid H3PO3 Basic information:
| Molecular Weight |
81.99 |
| CAS No. |
13598-36-2 |
| Density |
1.65 |
| Melting point |
73 |
| Boiling point |
200 |
| Character |
Achromatic crystal,density1.65g/m3,better hygroscopi-
city,dissolved easily in the water,has corrosive characteristics |
| Usage |
Widely used as the raw materials to make phosphorous
acid salt,used as the raw materials for making of plastic
stabilizator in the plastic industry,used as reducer in
chemical reaction,also used in the olefin industry,
agricultural chemical industry and so on. |
| Export |
Film Plastic Knitted Bag,kraft paper complex bag inner
layer,double layers plastic bag with net weight of 25kg |
Quality Index: (The Chemistry Industry HG/T2520-93Standards of the Peoples Republic of China)
| Inspection items |
The degree of the products |
Best Grade
Products |
Best Grade
Products |
First grade
products |
| Main contents(counted with H3PO3) |
99 |
98.5 |
98 |
| Iron(counted with Fe) |
0.001 |
0.0015 |
0.0020 |
| Chloride(counted with C1) |
0.008 |
0.01 |
0.01 |
| Sulfate(counted with SO4) |
0.001 |
0.002 |
0.002 |
| Phosphate(counted with SO4) |
0.1 |
0.2 |
0.2 |
| Complexion |
White crystal |
White crystal |
White crystal |
| Water solution experiments |
White crystal |
Clear and achromatic |
Clear and achromatic |
Applications
Phosphorous acid is mainly used in the production of phosphates, synthetic fibers and organophosphorus pesticides, etc.. It is also used in producing high performance water treating agent ATMP.
Package
25kg / 500kg / 1000kg in woven bag lined with double layer polythene bag.
The packaging should be marked with "CORROSIVE"sign.
Agrochemical :Phosphorous acid is used to prepare phosphite salts, such as potassium phosphite, which serve as excellent agricultural fungicides. These salts, in addition to aqueous solutions of pure phosphorous acid, are very effective in controlling a variety of microbial plant diseases. An important and nutritious element in all living species, phosphorous compounds are also applied extensively as fertilizer e.g. phosphites, phosphonates or phosphates.
Life Science : Used in chemical reactions as a reducing agent that is somewhat less vigorous than the related Hypophosphorous Acid
Oil & Gas : Phosphorus based compounds are used extensively in the oil industry as additives. These chemicals have properties which aid lubrication, oxidation and inflammability. They also have good thermal and cold resistance attributes. e.g. tributyl phosphate, tris(2-ethylhexyl) phosphate
Plastics & Polymers : Phosphorus compounds are used as PVC stabilsers to prevent decomposition and impart enhanced resistance to daylight, weathering and heat ageing. As lead based stablisers are being phased out within Europe, materials such as calcium phosphite are now widely used.
Water Treatment : One of the most important use of phosphorous acid is the production of phosphonates for industrial water treatment. Phosphonates are employed as chemical additives to function in a wide range of antiscalants and corrosion inhibitors, because they have high stability in the presence of oxidizing agents e.g. 2-phosphonobutane-1,2,4-tricarboxylic acid.
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