Skip to main content

Oxalic acid

ADVERTISEMENT
Identification
Molecular formula
C2H2O4
CAS number
144-62-7
IUPAC name
oxalic acid
State
State

At room temperature, oxalic acid is typically in a crystalline solid form. It is not volatile and thus not present as a gas under standard conditions.

Melting point (Celsius)
189.50
Melting point (Kelvin)
462.65
Boiling point (Celsius)
157.00
Boiling point (Kelvin)
430.15
General information
Molecular weight
90.04g/mol
Molar mass
90.0360g/mol
Density
1.9000g/cm3
Appearence

Oxalic acid is a white crystalline solid that readily forms a colorless solution in water. It crystallizes as the dihydrate, which means it usually contains two water molecules per molecule of oxalic acid.

Comment on solubility

Solubility of Oxalic Acid

Oxalic acid (C2H2O4) is known for its notable solubility characteristics. This organic compound displays the following solubility behavior:

  • Highly Soluble in Water: Oxalic acid is typically very soluble in water, with a solubility of approximately 10 g per 100 mL at room temperature.
  • Temperature Dependency: Its solubility increases with temperature, making it easier to dissolve at elevated temperatures.
  • Influence of pH: In more acidic conditions, oxalic acid is generally more soluble, while in basic solutions, its solubility can decrease.

It's important to note that while oxalic acid is soluble in water, it has limited solubility in organic solvents such as alcohols and ethers, making it a distinctive compound in its interactions.

To summarize, the solubility of oxalic acid can be characterized as:

  1. High in water
  2. Temperature-dependent
  3. Variable with pH levels

As a result, oxalic acid is relatively easy to handle in aqueous solutions, providing a versatile option in various chemical processes.

Interesting facts

Interesting Facts About Oxalic Acid

Oxalic acid, a fascinating organic compound, is best known for its high acidity and diverse applications in various fields. Here are some engaging insights about this intriguing molecule:

Chemical Structure and Sources

Oxalic acid has a simple molecular structure, featuring two carboxylic acid groups. It can be found naturally in numerous plants, particularly in:

  • Rhubarb leaves
  • Spinach
  • Beet greens
  • Chocolate

It's interesting to note that while these plants contain oxalic acid, consuming large amounts can be harmful, showcasing the fine balance between beneficial and toxic compounds in nature.

Uses and Applications

Oxalic acid is widely utilized across different industries for its various chemical properties. Some notable applications include:

  • Cleaning Agent: It’s an effective cleaner, especially for removing rust and mineral stains.
  • Bleaching Agent: Employed in the textile and wood industries to enhance brightness.
  • Metal Treatment: Used for rust removal and metal polishing in automotive and manufacturing sectors.
  • Chemical Reagent: Plays a significant role in laboratories, especially in acid-base titrations.

Health and Safety Considerations

While oxalic acid is useful, it's essential to handle it with care. Exposure can lead to:

  • Skin Irritation: Direct contact may cause burns.
  • Respiratory Issues: Inhalation of dust can lead to irritation.
  • Kidney Stone Formation: Oxalates can contribute to kidney stones in susceptible individuals.

This underlines the importance of understanding compound properties not just for their benefits but also for safety purposes.

Final Thoughts

Oxalic acid is a remarkable compound that stands out not only for its industrial applications but also for its presence in our natural surroundings. As you explore the world of chemistry, consider the duality of such compounds—both their utility and the caution needed in their use. Remember, in the words of famous chemist Linus Pauling, “The best way to have a good idea is to have lots of ideas.” In the case of oxalic acid, it invites us to think critically about our interactions with chemicals in nature.

Synonyms
oxalic acid
ethanedioic acid
144-62-7
Aktisal
Aquisal
Oxiric acid
Oxaalzuur
Oxalsaeure
Kyselina stavelova
Acide oxalique
Acido ossalico
Caswell No. 625
Acidum oxalicum
Ethanedionic acid
NCI-C55209
Ethane-1,2-dioic acid
Oxaalzuur [Dutch]
Oxalsaeure [German]
Acide oxalique [French]
CCRIS 1454
Acido ossalico [Italian]
EPA Pesticide Chemical Code 009601
HSDB 1100
Kyselina stavelova [Czech]
HOOCCOOH
Oxalic acid anhydrous
AI3-26463
NSC 62774
Ethandisaeure
C2H2O4
BRN 0385686
Acid, Oxalic
EINECS 205-634-3
H2ox
UNII-9E7R5L6H31
DTXSID0025816
CHEBI:16995
9E7R5L6H31
MFCD00002573
NSC-62774
DTXCID805816
Oxalicacid
EC 205-634-3
4-02-00-01819 (Beilstein Handbook Reference)
bis(5-azaspiro[2.5]octan-8-ol)
bis((2R)-azetidine-2-carbonitrile)
ETHANEDIOIC ACID DIHYDRATE
bis(1-(3-methyloxetan-3-yl)ethan-1-amine)
C00209
Oxalic acid alpha polymorph
Oxalic acid diammonium salt
547-66-0
CAS-144-62-7
OXD
OXALIPLATIN IMPURITY A (EP IMPURITY)
OXALIPLATIN IMPURITY A [EP IMPURITY]
NSC115893
Oxalic acid (aqueous)
Ethanedionate
Oxagel
2dua
2hwg
Oxalic Acid Dianion
Anhydrous oxalic acid
Ethane-1,2-dioate
Oxalic acid, 98%
Oxalic acid (8CI)
oxalic acid 2 hydrate
Oxalic acid, anhydrous
Oxalic acid 2-Hydrate
1o4n
1t5a
Oxalic acid 10 microg/mL in Acetonitrile
WLN: QVVQ
Ethanedioic acid (9CI)
OXALIC ACID [MI]
Oxalic acid dihydrate ACS
Ultraplast Activate S 52
bmse000106
OXALIC ACID [HSDB]
NCIOpen2_000770
NCIOpen2_001022
NCIOpen2_001042
NCIOpen2_001202
NCIOpen2_008831
OXALIC ACID [VANDF]
OXALIC ACID, 99%
Oxalic acid /Ethanedioic acid
OXALIC ACID [WHO-DD]
Oxalic acid, AR, >=99%
Oxalic acid, LR, >=98%
CHEMBL146755
Oxalic acid, 99% (Standard)
Ethanedioic acid;Aktisal;Aquisal
Oxalic acid, analytical standard
BDBM14674
HY-Y0262R
HY-Y0262
NSC62774
STR01359
Tox21_202122
Tox21_303346
BBL003000
NCI-55209
s9354
STK379550
AKOS005449445
CCG-266020
DB03902
FO26604
SB40938
SB40959
SB40985
Oxalic acid, ReagentPlus(R), >=99%
NCGC00249170-01
NCGC00257376-01
NCGC00259671-01
BP-21133
Oxalic acid, SAJ first grade, >=97.0%
CS-0013716
NS00077150
Oxalic acid, Vetec(TM) reagent grade, 98%
EN300-16428
G73503
Oxalic acid, purum, anhydrous, >=97.0% (RT)
Q184832
F1B1B2D7-C290-4CE6-8550-F25B202AFADE
F2191-0257
Oxalic acid, puriss. p.a., anhydrous, >=99.0% (RT)
Oxalic acid, purified grade, 99.999% trace metals basis
InChI=1/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6
Oxalate standard for IC, 1.000 g/L in H2O, analytical standard
bis(tert-butyl 4-[3-(methanesulfonyloxy)propyl]piperazine-1-carboxylate)
205-634-3
48J