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Naphthalene-2-sulfonic acid

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Identification
Molecular formula
C10H8O3S
CAS number
120-18-3
IUPAC name
naphthalene-2-sulfonic acid
State
State

At room temperature, naphthalene-2-sulfonic acid is a solid. Its crystalline structure gives it a firm and stable state, suitable for various industrial applications.

Melting point (Celsius)
330.00
Melting point (Kelvin)
603.15
Boiling point (Celsius)
215.00
Boiling point (Kelvin)
488.15
General information
Molecular weight
208.23g/mol
Molar mass
208.2230g/mol
Density
1.5190g/cm3
Appearence

Naphthalene-2-sulfonic acid typically appears as a white to off-white crystalline solid. It is often odorless and can exist in a powdered form. Its crystalline nature can make it appear shiny or slightly opaque.

Comment on solubility

Solubility of Naphthalene-2-sulfonic Acid

Naphthalene-2-sulfonic acid, often denoted as C10H9O3S, exhibits unique solubility characteristics that are essential for its applications in various chemical processes.

When discussing its solubility, one can note the following key points:

  • Water Solubility: Naphthalene-2-sulfonic acid is generally considered to be soluble in water due to the presence of the sulfonic acid group, which is polar and capable of forming hydrogen bonds with water molecules.
  • Organic Solvents: Its solubility in organic solvents varies; for example, it is less soluble in non-polar solvents like hexane but finds better solubility in polar organic solvents such as ethanol and acetone.
  • pH Effect: Solubility can also be affected by the pH of the solution. In acidic conditions, the acidic nature of its functional group can cause it to remain in its acid form; conversely, under basic conditions, it can ionize, leading to increased solubility.

In summary, the solubility profile of Naphthalene-2-sulfonic acid is influenced by its functional groups, solution pH, and the nature of the solvent. Understanding these factors can help in predicting its behavior in various chemical systems and applications.

Interesting facts

Interesting Facts about Naphthalene-2-Sulfonic Acid

Naphthalene-2-sulfonic acid is a fascinating compound that belongs to the class of aromatic sulfonic acids. This compound is well-known for its diverse applications in various fields of chemistry and industry. Here are some engaging insights:

  • Structure and Function: The structure of naphthalene-2-sulfonic acid consists of a naphthalene ring with a sulfonic acid group. This unique configuration provides it with significant reactivity, making it a valuable building block in organic syntheses.
  • Applications in Dyes: One of the most important uses of naphthalene-2-sulfonic acid is in the production of synthetic dyes. Its sulfonic acid group enhances the dye's solubility in water, which is crucial for dyeing processes, especially in textile industries.
  • Additive in Concrete: Surprisingly, this compound also plays a role in the construction industry. It is used as a plasticizer in concrete, which improves the workability of concrete mixtures and enhances their strength and durability.
  • Role in Chemical Reactions: In laboratories, naphthalene-2-sulfonic acid serves as an important reagent in various chemical reactions, such as sulfonation. It is particularly used in the synthesis of other complex organic compounds.
  • Environmental Considerations: Like many chemical compounds, the use of naphthalene-2-sulfonic acid requires careful handling. It is important for chemists and industries to be aware of its potential environmental impact and to implement proper safety measures.

"Understanding the role of compounds like naphthalene-2-sulfonic acid enriches our knowledge of organic chemistry and its practical applications."

In conclusion, naphthalene-2-sulfonic acid exemplifies the intricate relationship between chemical structure and functionality. Its versatility across multiple industries showcases the importance of aromatic sulfonic acids in modern chemistry.

Synonyms
Naphthalene-2-sulfonic acid
120-18-3
2-NAPHTHALENESULFONIC ACID
beta-Naphthylsulfonic acid
beta-Naphthalenesulfonic acid
Naphthalene-2-sulphonic acid
2-Sulfonaphthalene
2-Naphthylsulfonic acid
EINECS 204-375-3
Kyselina 2-naftalensulfonova
UNII-O9S4K2S25E
2-Naphthalenesulfonic acid, monohydrate
BRN 1955756
O9S4K2S25E
DTXSID5044788
CHEBI:44229
AI3-18435
MFCD00004089
Dehscofix 918 (Salt/Mix)
.beta.-Naphthalenesulfonic acid
DTXCID3024788
EC 204-375-3
4-11-00-00527 (Beilstein Handbook Reference)
2-NAPHTHALENESULFONIC ACID [MI]
2-Naphthalene Sulfonic Acid
Naphthalene-2-sulfonic acid hydrate (Salt/Mix)
2-Naphthalenesulfonic acid monohydrate (Salt/Mix)
Kyselina 2-naftalensulfonova [Czech]
2Sulfonaphthalene
2-Naphthylsulfonic acid; 2-Sulfonaphthalene; Dirinal NSK; ss-Naphthalenesulfonic acid; ss-Naphthylsulfonic acid
betaNaphthylsulfonic acid
Naphthalene2sulfonic acid
2-naphtalenesulfonic acid
2-napthalenesulfonic acid
Naphthalene2sulphonic acid
Kyselina 2naftalensulfonova
2-naphthalenesulphonic acid
betaNaphthalenesulfonic acid
SCHEMBL1556
.beta.-Naphthylsulfonic acid
beta-naphthalene sulfonic acid
CHEMBL1234624
I(2)-NaphthalinsulfosA currencyure
Tox21_301657
UN2583
AKOS015897326
AC-2569
AT25159
DB08254
FN33611
NCGC00256154-01
AS-17822
CAS-120-18-3
DB-061709
B0258
N0437
NS00000299
2-Naphthalenesulfonic acid, technical grade, 70%
L022029
Naphthalene-2-sulfonic acid 2-Naphthalenesulfonic acid
Q10395590