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Citric acid

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Identification
Molecular formula
C6H8O7
CAS number
77-92-9
IUPAC name
3-hydroxybutane-1,2,3-tricarboxylic acid
State
State

At room temperature, citric acid is generally found as a solid.

Melting point (Celsius)
153.00
Melting point (Kelvin)
426.15
Boiling point (Celsius)
310.00
Boiling point (Kelvin)
583.15
General information
Molecular weight
192.12g/mol
Molar mass
192.1240g/mol
Density
1.6650g/cm3
Appearence

Citric acid appears as a white crystalline powder at room temperature. It is often found as colorless crystals and is highly soluble in water. When dissolved, it gives a sour taste, contributing to its use in food and drinks as a preservative and a flavoring agent.

Comment on solubility

Solubility of 3-hydroxybutane-1,2,3-tricarboxylic acid (C6H8O7)

3-hydroxybutane-1,2,3-tricarboxylic acid, commonly known as citric acid, exhibits remarkable solubility characteristics that make it a widely used compound in various applications. Its solubility can be summarized as follows:

  • Highly soluble in water: Citric acid is known for its excellent solubility in water, making it easy to incorporate into aqueous solutions. This property is largely due to the presence of multiple carboxylic acid groups, which can form hydrogen bonds with water molecules.
  • Thermal stability: The solubility of citric acid may be influenced by temperature, with higher temperatures generally increasing its solubility. This can be particularly beneficial in industrial processes.
  • pH dependency: The solubility is also affected by the pH of the solution. In acidic conditions, citric acid remains soluble, while in more neutral to basic environments, its solubility may decrease.
  • Precipitation tendencies: At higher concentrations, citric acid can lead to the formation of solid precipitates, especially when interacting with metal ions.

Overall, citric acid's solubility properties are crucial for its role in food, pharmaceuticals, and biochemical applications. Its ability to dissolve readily in water enhances its functionality as an acidulant and preservative, thereby making it an indispensable compound in various industries.

Interesting facts

Interesting Facts about 3-Hydroxybutane-1,2,3-tricarboxylic Acid

3-Hydroxybutane-1,2,3-tricarboxylic acid, commonly known as citric acid, is a fascinating compound with a myriad of applications and properties. Here are some compelling insights into this intriguing molecule:

  • Natural Presence: Citric acid is naturally found in citrus fruits such as lemons, limes, and oranges. It plays a vital role in the metabolic processes of all living organisms.
  • Food Industry Staple: It is widely used as a preservative and flavoring agent in the food industry, enhancing the sour taste of products while preventing spoilage.
  • Antioxidant Properties: Citric acid acts as an antioxidant, helping to combat oxidative stress in cells, which is particularly beneficial in food preservation.
  • Biochemical Functions: In biochemistry, citric acid is a key component of the citric acid cycle (Krebs cycle), an essential metabolic pathway for producing energy in cells.
  • Industrial Applications: Beyond its culinary use, citric acid is utilized in manufacturing processes, particularly in the production of cleaning agents and personal care products.
  • Buffering Agent: It serves as a buffering agent in various laboratory settings, helping to maintain pH levels in solutions.

As renowned scientist Richard Feynman once stated, "The beauty of a flower is in the details." In the case of citric acid, its multifaceted applications and roles in nature reflect the intricate beauty of chemical compounds. This remarkable acid is not just about sourness; it embodies the intersection of chemistry, biology, and industry.

With ongoing research, the potential health benefits of citric acid continue to surface, paving the way for innovations in both health and industry.

Synonyms
3-hydroxybutane-1,2,3-tricarboxylic acid
threo-alpha-Methylisocitrate
alpha-Methylisocitrate
6061-95-6
3-Hydroxy-1,2,3-butanetricarboxylate
3-Carboxy-2,3-dideoxy-4-C-methylpentaric acid
DL-threo-alpha-Methylisocitrate
8518EC1Z2E
UNII-8518EC1Z2E
1,2,3-Butanetricarboxylic acid, 3-hydroxy-
d.l-methylisocitrate
methyl isocitric acid
2-Methylisocitric acid
DL-Methylisocitric acid
(2R,3S)2-methylisocitrate
SCHEMBL321093
DTXSID20976051
CHEBI:142525
.ALPHA.-METHYLISOCITRIC ACID
3-hydroxy-1,2,3-Butanetricarboxylic acid
PENTARIC ACID, 3-CARBOXY-2,3-DIDEOXY-4-C-METHYL-