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Benzenesulfonic acid

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Identification
Molecular formula
C6H5SO3H
CAS number
98-11-3
IUPAC name
benzenesulfonic acid
State
State

At room temperature, benzenesulfonic acid is typically a solid. Due to its hygroscopic nature, it can absorb moisture from the atmosphere, which can affect its physical form.

Melting point (Celsius)
43.00
Melting point (Kelvin)
316.15
Boiling point (Celsius)
215.00
Boiling point (Kelvin)
488.15
General information
Molecular weight
158.18g/mol
Molar mass
158.1760g/mol
Density
1.6394g/cm3
Appearence

Benzenesulfonic acid typically appears as a white crystalline solid. It may also be found in the form of a syrup depending on its hydration state. This compound is well-known for its effectiveness as an acid catalyst, and its solid form is often favored for being stable and easy to handle.

Comment on solubility

Solubility of Benzenesulfonic Acid

Benzenesulfonic acid, with the chemical formula C6H5SO3H, displays interesting solubility characteristics due to the presence of both a hydrophobic benzene ring and a hydrophilic sulfonic acid group. The solubility of this compound is primarily influenced by several factors:

  • Water Solubility: Benzenesulfonic acid is quite soluble in water, largely due to its sulfonic acid group which can ionize, creating a negative charge that stabilizes interaction with water molecules.
  • Organic Solubility: It is also soluble in various organic solvents, such as ethanol and acetone, owing to its non-polar benzene ring which can interact with non-polar solvent molecules.
  • pH Dependency: The solubility can vary with pH, especially in solutions where the acidity or basicity may influence the ionization of the acid group.

To summarize, the solubility of benzenesulfonic acid is characterized by its ability to dissolve:

  1. Readily in water due to ionization
  2. In various organic solvents due to its hydrophobic nature
  3. Different at varying pH levels influenced by solvation interactions

Overall, due to its unique chemical structure, benzenesulfonic acid is a versatile compound with significant solubility in both aqueous and organic environments, making it an important substance in various chemical applications.

Interesting facts

Interesting Facts about Benzenesulfonic Acid

Benzenesulfonic acid, often referred to as a versatile compound in the world of chemistry, plays a crucial role in various applications due to its unique properties. Here are some noteworthy highlights:

  • Functional Groups: It is characterized by the presence of a sulfonic acid group (-SO3H) attached to the benzene ring, which contributes to its solubility in water and enhances its reactivity.
  • Applications: Benzenesulfonic acid is widely used in the production of dyes, detergents, and pharmaceuticals. Its ability to act as a surfactant makes it an essential ingredient in many cleaning products.
  • Precursor to Other Compounds: This compound serves as an important precursor in the synthesis of various sulfonate esters and sulfonamides, which are valuable in medicinal chemistry.
  • Catalytic Properties: In organic chemistry, benzenesulfonic acid can be employed as a catalyst in many reactions, facilitating transformations that might otherwise require more complex conditions.
  • Environmental Considerations: While useful, it's important to handle benzenesulfonic acid with care due to its corrosive nature. Proper safety protocols should always be followed in laboratory settings.

In conclusion, benzenesulfonic acid is more than just a simple sulfonic acid; its relevance in industrial applications and organic synthesis makes it a compound of great interest to scientists and chemistry students alike. As Marie Curie once stated, "Nothing in life is to be feared, it is only to be understood." Understanding such compounds leads to advancements in technology and science.

Synonyms
BENZENESULFONIC ACID
98-11-3
Phenylsulfonic acid
Benzenesulphonic acid
Besylic acid
benzensulfonic acid
Benzene sulphonic acid
Benzenemonosulfonic acid
Benzene sulfonic acid
Kyselina benzensulfonova
CCRIS 4595
HSDB 2642
Blu-gard snitizing teat dip
EINECS 202-638-7
BRN 0742513
17-120A
DTXSID9024568
CHEBI:64455
AI3-15297
UNII-685928Z18A
MFCD00011689
DTXCID404568
685928Z18A
EC 202-638-7
4-11-00-00027 (Beilstein Handbook Reference)
BENZENESULFONIC ACID (II)
BENZENESULFONIC ACID [II]
CAS-98-11-3
Kyselina benzensulfonova [Czech]
benezenesulfonate
benzenesulphonicacid
phenyl sulfonic acid
benzolsulfonsäure
starbld0034875
Ph-SO3H
SCHEMBL2509
CHEMBL1422641
BENZENESULFONIC ACID [MI]
BENZENESULFONIC ACID [HSDB]
BCP30635
CS-D1398
STR07703
Benzenesulfonic acid, 98.0% (T)
Tox21_201960
Tox21_303131
STL280343
AKOS015856636
FB01600
PB48035
BENZENESULFONIC ACID (SURFACTANT)
NCGC00091687-01
NCGC00091687-02
NCGC00256989-01
NCGC00259509-01
Benzenesulfonic acid, (benzene < 2 ppm)
Benzenesulfonic acid, technical grade, 90%
B0030
B3408
NS00009548
Benzenesulfonic acid, technical, >=90% (T)
EN300-84101
D89012
SBI-0653930.0001
Q421494
SR-01000944759
SR-01000944759-1
Phenylsulfonic acid;Besylic acid;Kyselina benzensulfonova
InChI=1/C6H6O3S/c7-10(8,9)6-4-2-1-3-5-6/h1-5H,(H,7,8,9
202-638-7
p-Toluenesulfonic acid, polymer bound (MP-TsOH), loading: 3-7 mmol/g, poly(stryene-co-DVB) resin, 30 - 60 mesh