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4-hydroxynaphthalene-1-sulfonic acid

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Identification
Molecular formula
C10H8O4S
CAS number
84-86-6
IUPAC name
4-hydroxynaphthalene-1-sulfonic acid
State
State

At room temperature, 4-hydroxynaphthalene-1-sulfonic acid is a solid. It is stable under standard conditions but may need to be stored away from moisture to maintain its integrity.

Melting point (Celsius)
151.00
Melting point (Kelvin)
424.15
Boiling point (Celsius)
450.00
Boiling point (Kelvin)
723.15
General information
Molecular weight
224.23g/mol
Molar mass
224.2260g/mol
Density
1.6670g/cm3
Appearence

4-Hydroxynaphthalene-1-sulfonic acid appears as a brown crystalline solid. It is often available in the form of its sodium or potassium salts for industrial use. The compound may have a slight phenolic odor due to the hydroxyl group attached to the naphthalene ring.

Comment on solubility

Solubility of 4-hydroxynaphthalene-1-sulfonic acid

4-hydroxynaphthalene-1-sulfonic acid, often referred to in the chemical community as HSN, exhibits notable solubility properties which are essential for its practical applications. Here are the key points concerning its solubility:

  • Water Solubility: This compound is soluble in water due to the presence of the sulfonic acid group, -SO3H, which is a strong polar group that facilitates hydrophilic interactions.
  • Solvent Interaction: 4-hydroxynaphthalene-1-sulfonic acid shows better solubility in polar solvents, making it a valuable reagent in aqueous reactions.
  • pH Dependence: Its solubility can vary with pH levels. At higher pH, the sulfonic acid group may deprotonate, thereby impacting the solubility characteristics.
  • Temperature Effects: Increasing temperature typically enhances the solubility of this compound, akin to many other ionic compounds.

In summary, the solubility of 4-hydroxynaphthalene-1-sulfonic acid is primarily influenced by its ionic nature and the chemical environment. As stated in numerous studies, "polar solvents along with suitable pH conditions enhance the dissolution of this compound, making it versatile in various chemical settings." Its ability to easily dissolve in water enables its use in laboratories and industrial applications, where it plays a crucial role.

Interesting facts

Interesting Facts about 4-Hydroxynaphthalene-1-sulfonic Acid

4-Hydroxynaphthalene-1-sulfonic acid is a fascinating compound with a diverse range of applications and properties that are intriguing to both scientists and chemistry students alike. Here are some noteworthy points:

  • Historical Significance: This compound belongs to the family of naphthalenes which have been utilized since the late 19th century in dye and pigment manufacturing. Its derivatives have played a crucial role in the development of synthetic dyes.
  • Biological Relevance: 4-Hydroxynaphthalene-1-sulfonic acid has been studied for its potential applications in medicinal chemistry. Its structure allows for various modifications, which can lead to bioactive derivatives.
  • Analytical Applications: This compound serves as a reagent in various chemical analyses. It can be employed in the **sulfonation** of aromatic compounds, providing a means of functionalizing substrates in synthetic organic chemistry.
  • Environmental Impact: Like many sulfonic acids, it is of interest in environmental chemistry, particularly concerning waste water treatment processes, where its removal and degradation can be vital for maintaining ecological balance.
  • Structure-Activity Relationship: Researchers investigate how changes to its structure can impact the compound's properties and efficacy in certain applications, particularly in the field of pharmaceuticals.

In summary, 4-hydroxynaphthalene-1-sulfonic acid presents a rich area for study and application. Its historical context, analytical uses, biological relevance, and environmental considerations underscore its importance in both practical and theoretical chemistry. As you dive deeper into the world of chemical compounds, you may find it rewarding to explore how multifaceted a single compound can be!

Synonyms
1-NAPHTHOL-4-SULFONIC ACID
84-87-7
4-hydroxynaphthalene-1-sulfonic acid
NW Acid
4-Hydroxy-1-naphthalenesulfonic acid
1-Naphthalenesulfonic acid, 4-hydroxy-
Neville-winther acid
Nevile and Winther's acid
1,4-Oxy Acid
4-Hydroxynaphthalene-1-sulphonic acid
1-Naphtho-4-sulfonic acid
1-Hydroxy-4-naphthalenesulfonic acid
1-Naphthalenesulfonicacid, 4-hydroxy-
6W41U3C9YN
alpha-Naphthol-4-sulfonic acid
NSC 9587
NSC-9587
EINECS 201-568-4
DTXSID2058910
EC 201-568-4
1-NAPHTHOL-4-SULFONIC ACID [MI]
UNII-6W41U3C9YN
MFCD00065324
1,4-naphthol sulfonic acid
SCHEMBL249254
CHEMBL2312197
DTXCID6048385
NSC9587
.alpha.-Naphthol-4-sulfonic acid
4-Hydroxynaphthalene-1-sulfonicacid
ALBB-037228
1-hydroxy-4-naphthalenesulfonic acod
1-Hydroxynaphthalene-4-sulfonic acid
1-hydroxynaphthalene-4-sulphonic acid
4-hydroxy-naphthalene-1-sulfonic acid
AKOS007930282
AC-10634
AS-38150
FN149871
CS-0171427
NS00001257
Q27265617
4-HYDROXY-1-NAPHTHALENESULFONIC ACID, SO DIUM SALT HYDRATE, TECH., CA. 70%