oxalic acid | CAS No. 144-62-7

Q: What is oxalic acid (CAS: 144-62-7)?

Oxalic acid, with the chemical formula C2H2O4, is a naturally occurring dicarboxylic acid. It is a white, crystalline solid that is soluble in water and has a sharp, sour odor. Oxalic acid is known for its strong acidic properties and ability to form insoluble salts with many cations. It is commonly found in plants and is used in various industrial and chemical applications due to its reactivity and chelating abilities.

Q: What are the main uses of oxalic acid (CAS: 144-62-7)?

Oxalic acid has diverse applications, including as a cleaning agent, a reducing agent in chemical synthesis, and a component in some pharmaceuticals. It is used in the textile industry for dyeing and in metal processing for removing rust. In food, it is present in small amounts in certain fruits and vegetables. Researchers also use it in analytical chemistry for its ability to complex metal ions and in the preparation of other compounds.

Q: Is oxalic acid (CAS: 144-62-7) safe?

Oxalic acid is toxic if ingested or inhaled and can cause severe health effects. It should be handled with care, using appropriate personal protective equipment. Safety data sheets recommend avoiding prolonged exposure and ensuring proper ventilation. Oxalic acid is classified as a hazardous substance, and its use should comply with safety regulations to minimize risks.

Q: How should oxalic acid (CAS: 144-62-7) be stored?

Oxalic acid should be stored in a cool, dry, and well-ventilated place away from light. It is typically kept in airtight containers to prevent moisture absorption. Due to its hygroscopic nature, it should be protected from humidity. Storage conditions should maintain a temperature below 25°C and avoid exposure to incompatible materials to ensure stability and safety.

oxalic acid

Basic Information

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CAS Number

144-62-7

Molecular Formula

C2H2O4

Molecular Weight

90.03 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Water Treatment Chemicals Coagulants and Flocculants Inorganic Coagulants

Basic Physical Properties

Melting Point

189.5 °C (dec.)

Boiling Point

365.1°C (estimate)

Water Solubility

90 g/L (20 ºC)

Flash Point

101-157°C

Solubility

water: soluble108g/L at 25°C

Refractive Index

1.4261 (estimate)

Vapor Pressure

<0.01 mmHg ( 20 °C)

Vapor Density

4.3 (NTP, 1992) (Relative to Air)

Odor

Odorless.

SMILES

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OC(=O)C(=O)O

InChI

InChI=1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6)

InChIKey

MUBZPKHOEPUJKR-UHFFFAOYSA-N

LogP

-0.8443999999999998

pKa

1.23(at 25℃)

Topological Polar Surface Area

74.6 Å²

Hydrogen Bond Donor/Acceptor

2 / 4

Complexity

71.5

Safety Information

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GHS Hazard Pictograms

H302

H312

Hazard Statement

H302 Harmful if swallowed
Acute toxicity, oral

H312 Harmful in contact with skin
Acute toxicity, dermal

Hazard Class

Class 8 Class 8

Stability

Stable, but moisture sensitive. Incompatible with metals.

Sensitiveness

Sensitive to humidity

Synonyms & References

English

Oxalic acid
OXALIC ACID REAGENT
OXALIC ACID STANDARD
OXALATE ION CHROMATOGRAPHY STANDARD
PH STANDARD SOLUTION OXALATE BUFFER
BETZ 0295
ETHANEDIOIC ACID
OXALIC ACID(P)
Oxalicacid,0.1Nstandardsolution2.5LT
Aktisal
Aquisal
DeerClean
HOOCCOOH
Oxaalzuur
oxalic
Oxalic acid, 0.1 N standard solution
Oxalic acid Ethanedioic acid acide oxalique
Oxalic acid anhydrous
Ethanedionic acid
Kleesαure
Oxalsαure
NSC 62774
Oxiric acid
Oxalsaeure
Kyselina stavelova
Acide oxalique
Acido ossalico
Acidum oxalicum
Caswell No. 625
Oxaalzuur [Dutch]
Oxalsaeure [German]

MDL Number

MFCD00002573

Customs Code

29171110

FAQ

What is oxalic acid (CAS: 144-62-7)?

Oxalic acid, with the chemical formula C2H2O4, is a naturally occurring dicarboxylic acid. It is a white, crystalline solid that is soluble in water and has a sharp, sour odor. Oxalic acid is known for its strong acidic properties and ability to form insoluble salts with many cations. It is commonly found in plants and is used in various industrial and chemical applications due to its reactivity and chelating abilities.

What are the main uses of oxalic acid (CAS: 144-62-7)?

Oxalic acid has diverse applications, including as a cleaning agent, a reducing agent in chemical synthesis, and a component in some pharmaceuticals. It is used in the textile industry for dyeing and in metal processing for removing rust. In food, it is present in small amounts in certain fruits and vegetables. Researchers also use it in analytical chemistry for its ability to complex metal ions and in the preparation of other compounds.

Is oxalic acid (CAS: 144-62-7) safe?

Oxalic acid is toxic if ingested or inhaled and can cause severe health effects. It should be handled with care, using appropriate personal protective equipment. Safety data sheets recommend avoiding prolonged exposure and ensuring proper ventilation. Oxalic acid is classified as a hazardous substance, and its use should comply with safety regulations to minimize risks.

How should oxalic acid (CAS: 144-62-7) be stored?

Oxalic acid should be stored in a cool, dry, and well-ventilated place away from light. It is typically kept in airtight containers to prevent moisture absorption. Due to its hygroscopic nature, it should be protected from humidity. Storage conditions should maintain a temperature below 25°C and avoid exposure to incompatible materials to ensure stability and safety.