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Sulfanilic acid

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Identification
Molecular formula
C6H7NO3S
CAS number
121-57-3
IUPAC name
3-aminobenzenesulfonic acid
State
State

Sulfanilic acid is typically found in a solid state at room temperature. It is crystalline in nature, revealing its structured aromatic composition. Its solid form allows handling as a powder, which is useful for chemical reactions and synthesis applications.

Melting point (Celsius)
288.00
Melting point (Kelvin)
561.00
Boiling point (Celsius)
310.00
Boiling point (Kelvin)
583.00
General information
Molecular weight
173.20g/mol
Molar mass
173.1950g/mol
Density
1.4850g/cm3
Appearence

Sulfanilic acid typically appears as a white to off-white crystalline powder. While it is generally quite stable, like many aromatic compounds, its structure can lead to a characteristic aromatic odor.

Comment on solubility

Solubility of 3-Aminobenzenesulfonic Acid

3-Aminobenzenesulfonic acid, also known as anthranilic acid, is a compound with notable solubility characteristics. Its solubility in various solvents contributes to its versatility in chemical processes. Here are some key points regarding its solubility:

  • Water Solubility: 3-Aminobenzenesulfonic acid is highly soluble in water due to its sulfonic acid group, which forms strong hydrogen bonds with water molecules.
  • Solvent Compatibility: The compound shows varying solubility in organic solvents; for instance, it is less soluble in non-polar solvents like hexane, but it dissolves well in polar solvents such as ethanol and methanol.
  • pH Dependence: The solubility can change with the pH of the solution. It tends to be more soluble in alkaline conditions, where it can exist as a deprotonated anion.
  • Temperature Influence: Like many solutes, the solubility of 3-aminobenzenesulfonic acid increases with temperature, allowing it to dissolve more readily at elevated temperatures.

In summary, 3-aminobenzenesulfonic acid demonstrates:

  1. High solubility in water
  2. Variable solubility in organic solvents
  3. pH-dependent solubility
  4. Temperature-related solubility increase

This unique solubility profile makes 3-aminobenzenesulfonic acid a valuable compound in various applications, particularly in chemical synthesis and as a dye intermediate.

Interesting facts

Interesting Facts About 3-Aminobenzenesulfonic Acid

3-Aminobenzenesulfonic acid, commonly known as m-anisidine sulfonic acid, is a fascinating compound that plays a significant role in various fields of chemistry and industry. Here are some intriguing aspects of this compound:

  • Versatile Chemical Intermediate: This compound acts as a crucial intermediate in the synthesis of various dyes and pigments, proving essential in the textile and paper industries.
  • Biological Relevance: 3-Aminobenzenesulfonic acid is a precursor to important pharmaceuticals and can exhibit biological activity, making it relevant in medicinal chemistry.
  • Environmental Considerations: As with many sulfonic acids, the environmental impact of 3-aminobenzenesulfonic acid is being studied, especially regarding its biodegradation and potential toxicity.
  • pH Indicator: The sulfonic acid group makes this compound useful in modifying pH levels in various applications, showcasing its importance beyond just synthesis.
  • Research Applications: Ongoing research explores the properties of 3-aminobenzenesulfonic acid, including its potential applications in nanotechnology and materials science.

Quote from Chemistry Textbooks: "The aromatic sulfonic acids, including 3-aminobenzenesulfonic acid, continue to be at the forefront of chemical innovation, merging organic chemistry with practical applications.”

In summary, the multifaceted nature of 3-aminobenzenesulfonic acid showcases its importance in both industrial applications and scientific research, providing a rich field for further exploration and discovery.

Synonyms
Metanilic acid
3-AMINOBENZENESULFONIC ACID
121-47-1
Benzenesulfonic acid, 3-amino-
m-Aminobenzenesulfonic acid
m-Sulfanilic acid
m-Anilinesulfonic acid
1-Aminobenzene-3-sulfonic acid
3-Amino-benzenesulfonic acid
Kyselina metanilova
3-Aminobenzenesulphonic acid
3-Sulfoaniline
Aminobenzenesulfonic acid
Kyselina anilin-3-sulfonova
Aniline-m-sulfonic acid
Kyselina metanilova [Czech]
NSC 4504
3-AMINOBENZENE SULFONIC ACID
CCRIS 2760
3-aminobenzene-1-sulfonic acid
EINECS 204-473-6
Kyselina anilin-3-sulfonova [Czech]
OT03NUM20P
BRN 0473264
DTXSID6024462
CHEBI:27764
3-anilinesulfonic acid
AI3-23215
aniline-3-sulphonic acid
NSC-4504
m-Aminophenylsulfonic acid
METANILIC ACID [MI]
DTXCID804462
EC 204-473-6
4-14-00-02647 (Beilstein Handbook Reference)
AMINOBENZENESULFONIC ACID, M-
MFCD00065345
UNII-OT03NUM20P
m-Amino benzenesulfonic acid
3Sulfoaniline
mSulfanilic acid
m-sulphanilic acid
Anilinemsulfonic acid
mAnilinesulfonic acid
3Anilinesulfonic acid
Anilinemsulphonic acid
mAniline sulfonic acid
3_aminobenzene_sulfonide
mAminophenylsulfonic acid
3Aminophenylsulfonic acid
Kyselina anilin3sulfonova
mAminobenzenesulfonic acid
WLN: ZR CSWQ
3Aminobenzenesulfonic acid
3Aminobenzenesulphonic acid
mAminobenzene sulfonic acid
1Aminobenzene3sulfonic acid
3Aminobenzene sulfonic acid
m-aminobenzene sulfonic acid
3-amino benzenesulfonic acid
Benzenesulfonic acid, 3amino
SCHEMBL29044
metaAminobenzene sulfonic acid
M-ANILINE SULFONIC ACID
ANILINE-M-SULPHONIC ACID
CHEMBL1456811
3-AMINOPHENYLSULFONIC ACID
NSC4504
3-Aminobenzenesulfonic acid, 97%
AAA12147
Tox21_201027
STK661724
AKOS000299087
META-AMINOBENZENE SULFONIC ACID
CS-W017552
NCGC00091239-01
NCGC00091239-02
NCGC00258580-01
AS-15878
CAS-121-47-1
3-Aminobenzenesulfonic acid Metanilic acid
DB-041620
A0265
NS00020466
EN300-19726
C06334
E80404
AE-562/43459497
Q1422618
F0001-0345
Z104474954
105009-55-0