Phosphonic acid

Basic Information

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CAS Number

13598-36-2

Molecular Formula

H3O3P

Molecular Weight

81.99 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Agricultural Chemicals Pesticides Insecticides

Water Treatment Chemicals Coagulants and Flocculants Inorganic Coagulants

Basic Physical Properties

Melting Point

73 ºC

Boiling Point

200 ºC

Flash Point

200°C

SMILES

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O[P@@H](=O)O

InChI

InChI=1S/H3O3P/c1-4(2)3/h4H,(H2,1,2,3)

InChIKey

ABLZXFCXXLZCGV-UHFFFAOYSA-N

LogP

-0.6393

pKa

pK1 1.29; pK2 6.74(at 25℃)

Topological Polar Surface Area

57.53 Å²

Hydrogen Bond Donor/Acceptor

2 / 3

Complexity

26.3

Safety Information

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GHS Hazard Pictograms

H302

H314

Hazard Statement

H302 Harmful if swallowed
Acute toxicity, oral

H314 Causes severe skin burns and eye damage
Skin corrosion/irritation

Hazard Class

Class 8 Class 8

Stability

Stable. Incompatible with strong bases. Hygroscopic.

Sensitiveness

Air Sensitive & Hygroscopic

Synonyms & References

English

Phosphorous acid
Phosphonic acid
hydrogen phosphonate
phosphorus(+3) trihydride cation trihydroxide
Orthophosphorus
orthophosphorus acid
Phoenicol
phosphorus acid
rac-Phoenicol
Orthophosphorous acid
Phosphonsure
AURORA KA-1076
ORTHOPHOSPHOROUS
Phospohorous acid
O-PHOSPHOROUS ACID
PhosphorousAcid>98%

MDL Number

MFCD00137258

Customs Code

2811199090

FAQ

What are the physical and chemical properties of Phosphonic acid (CAS: 13598-36-2)?

Phosphonic acid is a colorless to white crystalline solid with a molecular weight of approximately 97.01 g/mol. It is sparingly soluble in water but more soluble in organic solvents. Phosphonic acid is highly reactive, particularly towards nucleophilic substitution reactions and can form stable complexes with metal ions.

How is Phosphonic acid (CAS: 13598-36-2) typically synthesized?

Phosphonic acid can be synthesized via the hydrolysis of phosphonous esters, reduction of phosphonates, or oxidation of phosphite compounds. The synthesis typically involves the use of acidic catalysts and can achieve high yields. The choice of method depends on the availability of starting materials and desired product purity.

What industries use Phosphonic acid (CAS: 13598-36-2)?

Phosphonic acid is widely used in the pharmaceutical industry for the synthesis of drug intermediates, in the polymer industry for enhancing properties of polymers, and in the semiconductor industry for etching and cleaning processes. It is also utilized in the production of sensors and as a chelating agent in water treatment.

What precautions should be taken when handling Phosphonic acid (CAS: 13598-36-2)?

When handling Phosphonic acid, it is essential to wear appropriate personal protective equipment (PPE) including gloves, goggles, and a lab coat. Work should be conducted in a well-ventilated area or fume hood. Spills should be neutralized with an appropriate base and cleaned up according to safety data sheet (SDS) guidelines. Proper disposal methods should be followed to ensure environmental safety.