Product Description
HIGH QUALITY PHOSPHOROUS ACID CAS NO 13598-36-2
Quality passed SGS&BV inspection
Phosphorous acid is an intermediate in the preparation of other phosphorus compounds.
Water dissolution test: clear and colorless.
Physical and chemical properties: a strong hygroscopicity and deliquescence, soluble in water and alcohol. Air slowly oxidized
into orthophosphoric acid. 180 ºC decomposition of phosphine and orthophosphoric acid. Corrosive.
Acute toxicity LD50: 1895mg / kg (rat oral); 1700mg / kg (mouse oral)
Application of Phosphorous acid:
The most important use of phosphorous acid (phosphonic acid) is the production of phosphites (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, are fungicides. Phosphites have shown effectiveness in controlling a variety of 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
Usage of Phosphorous acid:
1, Phosphorous acid is used as a reducing agent, nylon brightener, can also be used as raw materials for phosphite, pesticide
intermediates and organic phosphorus water treatment agent;
2, Phosphorous acid is the manufacture of phosphite raw materials, but also the manufacture of plastic stabilizers and organic
phosphorus pesticide raw materials;
3, Phosphorous acid can be used as a polycarbonate stabilizer;
4, Phosphorous acid can be used as chemical reagents.
Storage of Phosphorous acid:
Stored in a cool, ventilated warehouse. Keep away from fire and heat. Packaging requirements sealed, not in contact with air.
Should be stored separately with the base, avoid mixing reservoir. The storage area shall be provided with suitable material to
contain the spill.
Caution:
Phosphorous acid is a two inorganic acid corrosion products, the risk code number: 93014
R22:Harmful if swallowed.
R35:Causes severe burns.
Detailed Photos
Phosphorous acid 98.5%
Other name:Phosphonic acid; hydrogen phosphonate;
phosphorus(+3) trihydride cation trihydroxide
CAS No.:13598-36-2
MF:H3PO3
EINECS:237-066-7
Appearance: colorless crystal powder
Molecular weight: 82
Density:1.651 g/cm3 (21 °C)
Melting point:73.6 °C (164.5 °F; 346.8 K)
Boiling point:200ºC(392 °F; 473 K) (decomposes)
Solubility in water: 310 g/100 mL
Application:Phosphate fertilizer
Classification:Organic Fertilizer
UN number: 2834
Quality Standard: HG/T 2520-93
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Yunnan Litto Chemicals Corporation is a professional chemicals company which has deal with fine chemicals more than 20 years,the product such as plant hormones,organic fertilizer has been exported to more than 30 countries.
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