Product Name: Phosphorous acid
Synonyms: Phosphorous acid, extra pure, 98%;Phosphorus trihydroxide;phosphorustrihydroxide;Trihydroxyphosphine;PHOSPHOROUSACID,REAGENT;Phosphonsure;Phosphorous acid, 98%, extra pure;AURORA KA-1076
CAS: 13598-36-2
MF: H3O3P
MW: 82
EINECS: 237-066-7
Product Categories: Phosphorus Series;Inorganic Chemicals;Inorganics
Mol File: 13598-36-2.mol

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
pka pK1 1.29; pK2 6.74(at 25℃)
form  Crystals
color  White
Specific Gravity 1.651
Water Solubility  SOLUBLE
Sensitive  Air Sensitive & Hygroscopic
Merck  14,7346
Stability: Stable. Incompatible with strong bases. Hygroscopic.
CAS DataBase Reference 13598-36-2(CAS DataBase Reference)
NIST Chemistry Reference (HO)2HPO(13598-36-2)
EPA Substance Registry System Phosphonic 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
F  3
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  28092019

Phosphorous acid Usage And Synthesis
Description Phosphorous 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.

Product Name: Phosphorous acid
Synonyms: Phosphorous acid, extra pure, 98%;Phosphorus trihydroxide;phosphorustrihydroxide;Trihydroxyphosphine;PHOSPHOROUSACID,REAGENT;Phosphonsure;Phosphorous acid, 98%, extra pure;AURORA KA-1076
CAS: 13598-36-2
MF: H3O3P
MW: 82
EINECS: 237-066-7
Product Categories: Phosphorus Series;Inorganic Chemicals;Inorganics
Mol File: 13598-36-2.mol

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
pka pK1 1.29; pK2 6.74(at 25℃)
form  Crystals
color  White
Specific Gravity 1.651
Water Solubility  SOLUBLE
Sensitive  Air Sensitive & Hygroscopic
Merck  14,7346
Stability: Stable. Incompatible with strong bases. Hygroscopic.
CAS DataBase Reference 13598-36-2(CAS DataBase Reference)
NIST Chemistry Reference (HO)2HPO(13598-36-2)
EPA Substance Registry System Phosphonic 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
F  3
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  28092019

Phosphorous acid Usage And Synthesis
Description Phosphorous 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.