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Phosphorous acid

Phosphorous acid Suppliers list
Company Name: Hangzhou Bayee Chemical Co., Ltd.
Tel: 0086-571-86990109; 0086-18605816692
Products Intro: Product Name:Phosphorous Acid; Phosphonic acid; Phosphorus acid
Purity:70% Min; 98.5% Min or 99% Min Package:25kg, 500kgs, 1000kgs plastic bag lined with PE or by customer's requirement
Company Name: Henan DaKen Chemical CO.,LTD.
Tel: +86-371-55531817
Products Intro: Product Name:Phosphorous acid
Purity:99% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Products Intro: CAS:13598-36-2
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: Mainchem Co., Ltd.
Tel: +86-0592-6210733
Products Intro: Product Name:Phosphorous acid
Company Name: Handan Huajun Chemicals Co., Ltd.  Gold
Tel: +86-310-8166583
Products Intro: Product Name:Phosphorous acid
Phosphorous acid Basic information
Description References
Product Name:Phosphorous acid
Synonyms:PHOSPHONIC ACID;PHOSPHORUS ACID;Phospohorous acid;Ortophosphorous acid;PHOSPHOROUS ACID 50 %;PhosphorousAcid>98%;PhosphorusAcid(Crystals)Pure;Phosphorous acid, extra pure, 98%
Product Categories:Inorganic Chemicals;Inorganics;Phosphorus Series
Mol File:13598-36-2.mol
Phosphorous acid Structure
Phosphorous acid Chemical Properties
Melting point 73 °C
Boiling point 200 °C
density 1.651 g/mL at 25 °C(lit.)
Fp 200°C
storage temp. 0-6°C
form Crystals
pkapK1 1.29; pK2 6.74(at 25℃)
color White
Water Solubility SOLUBLE
Sensitive Air Sensitive & Hygroscopic
Merck 14,7346
Stability:Stable. Incompatible with strong bases. Hygroscopic.
CAS DataBase Reference13598-36-2(CAS DataBase Reference)
NIST Chemistry Reference(HO)2HPO(13598-36-2)
EPA Substance Registry SystemPhosphonic acid(13598-36-2)
Safety Information
Hazard Codes C
Risk Statements 22-35
Safety Statements 26-36/37/39-45
RIDADR UN 2834 8/PG 3
WGK Germany 1
RTECS SZ6400000
HazardClass 8
PackingGroup III
MSDS Information
ACROS English
SigmaAldrich English
ALFA English
Phosphorous acid Usage And Synthesis
DescriptionPhosphorous acid is an intermediate in the preparation of other phosphorous compounds. It is a raw material to prepare phosphonates for water treatment such as iron and manganese control, scale inhibition and removal, corrosion control and chlorine stabilization. The alkali metal salts (phosphites) of phosphorous acid are being widely marketed either as an agricultural fungicide (e.g. Downy Mildew) or as a superior source of plant phosphorous nutrition. Phosphorous acid is used in stabilizing mixtures for plastic materials. Phosphorous acid is used for inhibiting high-temperature of corrosion-prone metal surfaces and to produce lubricants and lubricant additives.
References[1] Allison E. McDonald, Bruce R. Grant and William C. Plaxton, Phosphite (Phosphorous Acid): Its Relevance in The Environment and Agriculture and Influence on Plant Phosphate Starvation Response, Journal of Plant Nutrition, 2001, vol. 24, 1505-1519
[2] Sai-Shek Young, Stabilizers for plastic materials, Patent, 1993
[3] Guido Sartori, Method for inhibiting corrosion using phosphorous acid, Patent,2004
[4] John R Morris, Lubricant containing a phosphorous acid ester-aldehyde condensation product, Patent, 1956
Chemical Propertieswhite crystalline solid
General DescriptionA white or yellow crystalline solid (melting point 70.1 deg C) or a solution of the solid. Density 1.651 g /cm3 . Contact may severely irritate skin, eyes, and mucous membranes. Toxic by ingestion, inhalation and skin absorption.
Air & Water ReactionsDeliquescent. Absorbs oxygen from the air very readily to form phosphoric acid [Hawley]. Soluble in water.
Reactivity ProfilePhosphorous acid decomposes when heated to form phosphine, a gas that usually ignites spontaneously in air. Absorbs oxygen from the air to form phosphoric acid [Hawley]. Forms yellow deposits in aqueous solution that are spontaneously flammable upon drying. Reacts exothermically with chemical bases (for example: amines and inorganic hydroxides) to form salts. These reactions can generate dangerously large amounts of heat in small spaces. Dissolution in water or dilution of a concentrated solution with additional water may generate significant heat. Reacts in the presence of moisture with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas. Can initiate the polymerization of certain alkenes. Reacts with cyanide compounds to release gaseous hydrogen cyanide. May generate flammable and/or toxic gases in contact with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents. Additional gas-generating reactions occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (to give SO2), and carbonates (to give CO2).
Health HazardTOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire HazardNon-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Safety ProfileModerately toxic by ingestion. When heated to decomposition at 200℃ it emits toxic fumes of POx and phosphme whch may ignite. See also PHOSPHINE.
Tag:Phosphorous acid(13598-36-2) Related Product Information
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