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Sodium p-hydroxybenzoate

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Identification
Molecular formula
NaC7H5O3
CAS number
114-63-6
IUPAC name
sodium;4-hydroxybenzoate
State
State

At room temperature, sodium p-hydroxybenzoate is typically in a solid state. Due to its crystalline nature, it is stable under standard conditions and is commonly used in its solid form.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
265.80
Boiling point (Kelvin)
538.95
General information
Molecular weight
160.10g/mol
Molar mass
160.1040g/mol
Density
0.8300g/cm3
Appearence

Sodium p-hydroxybenzoate, also known as sodium paraben, typically appears as a white crystalline powder. It can also be available in granular form. The compound is known for its solubility in water, which contributes to its widespread use in various industries.

Comment on solubility

Solubility of Sodium 4-Hydroxybenzoate

Sodium 4-hydroxybenzoate, commonly referred to as sodium paraben, exhibits interesting solubility characteristics that are integral to its applications. Here are some key points to consider:

  • Solvent Properties: Sodium 4-hydroxybenzoate is highly soluble in water. This property facilitates its use in various aqueous solutions, particularly in pharmaceutical and cosmetic formulations.
  • Temperature Dependency: The solubility tends to increase with temperature, making it more effective at higher temperatures, which is an important factor for practical applications.
  • pH Influence: The solubility is also influenced by pH levels. In alkaline conditions, it remains soluble, hinting at its stability in environments where pH is a consideration.
  • Non-solubility in Organic Solvents: Conversely, it is poorly soluble in many organic solvents, which limits its effectiveness in certain organic phases.

In conclusion, the solubility of sodium 4-hydroxybenzoate is essential to its role in preserving and enhancing product formulations. As noted, its strong solubility in water coupled with its temperature and pH dependencies allows it to be versatile, while its poor solubility in organic solvents must be taken into account when formulating products. Understanding these nuances of solubility ensures optimal usage and efficiency in various applications.

Interesting facts

Interesting Facts about Sodium 4-Hydroxybenzoate

Sodium 4-hydroxybenzoate, commonly known as sodium paraben, is a fascinating compound with diverse applications and noteworthy characteristics. Here are some intriguing facts about this compound:

  • Preservative Power: Sodium 4-hydroxybenzoate is widely used as a preservative in cosmetics, pharmaceuticals, and food products due to its ability to inhibit the growth of bacteria, mold, and yeast.
  • Natural Origins: While manufactured synthetically, parabens are also found in some natural sources, such as certain fruits like blueberries and cranberries. This origin underscores their long history in nature.
  • Common Usage: You may find sodium paraben in products such as shampoos, lotions, and even baked goods. Its widespread use makes it a common ingredient, often listed simply as "paraben" on labels.
  • Controversial Compound: Over the years, sodium paraben has sparked discussions regarding safety and health concerns. Public perception and scientific research vary, which prompts ongoing debate on its use in personal care products.
  • pH Stability: This compound is stable in a broad range of pH levels, making it an effective preservative in various formulations. Its versatility is a significant factor in its popularity.

In summary, sodium 4-hydroxybenzoate not only serves critically in preserving products but is also an excellent subject for discussions regarding safety and natural compounds. As a chemistry student or a scientist, understanding its properties and applications is essential in both academia and industry. Remember, the choices we make about chemical compounds, including sodium paraben, can have lasting impacts on health and the environment!