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1-Amino-2-naphthalenesulfonic acid

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Identification
Molecular formula
C10H9NO3S
CAS number
81-05-0
IUPAC name
8-aminonaphthalene-2-sulfonic acid
State
State

At room temperature, this compound is in the form of a solid.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
-1.00
Boiling point (Kelvin)
-1.00
General information
Molecular weight
223.26g/mol
Molar mass
223.2560g/mol
Density
1.5400g/cm3
Appearence

1-Amino-2-naphthalenesulfonic acid appears as a white to off-white crystalline powder. It may absorb moisture from the air (hygroscopic) and can vary slightly in color depending on purity and presence of impurities. The compound does not emit any significant odor.

Comment on solubility

Solubility of 8-aminonaphthalene-2-sulfonic acid

8-aminonaphthalene-2-sulfonic acid, often referred to as a sulfonic acid derivative, exhibits interesting solubility characteristics due to its structural features. The presence of both an amino group and a sulfonic acid group contributes to its exceptional solubility in various solvents. Here are some key points to consider:

  • Water Solubility: 8-aminonaphthalene-2-sulfonic acid is readily soluble in water, a property attributed to the polar sulfonic acid group, which can form hydrogen bonds with water molecules.
  • Solvent Versatility: It also shows solubility in numerous organic solvents, including ethanol and methanol, further expanding its utility in chemical applications.
  • pH Dependency: The solubility can vary with pH, as the amino group may protonate at lower pH levels, enhancing interaction with water.
  • Practical Applications: Due to its solubility in water, it is often employed in dye and pigment formulations, allowing for ease of application and removal.

In summary, the solubility of 8-aminonaphthalene-2-sulfonic acid is a fascinating blend of polar interactions and structural variations, making it a remarkable compound for both laboratory research and industrial use.

Interesting facts

Interesting Facts about 8-Aminonaphthalene-2-Sulfonic Acid

8-Aminonaphthalene-2-sulfonic acid, often abbreviated as 8-ANSA, is a fascinating compound in the world of organic chemistry, particularly known for its role in research and various applications. Here are some engaging aspects of this compound:

  • Structure & Reactivity: The compound features a unique naphthalene backbone with an amino group and a sulfonic acid group. This combination allows it to participate in a wide range of chemical reactions, making it a valuable building block in syntheses.
  • Biological Significance: 8-ANSA is used in biological studies due to its ability to selectively bind to certain enzymes and proteins, aiding researchers in understanding biological processes at a molecular level.
  • Analytical Applications: Researchers utilize 8-ANSA in various analytical methods, such as fluorescence spectroscopy. Its fluorescence properties enable scientists to detect and quantify substances in complex mixtures.
  • Colorimetric Reactions: The compound is known for its colorimetric reactions, which can be employed in the detection of metals and other substances. These reactions are crucial in environmental monitoring and quality control.
  • Role in Dyes: 8-Aminonaphthalene-2-sulfonic acid has applications in dye manufacturing, particularly in synthesizing azo dyes, which are widely used in textiles and food industries.
  • Safety Considerations: While 8-ANSA is a valuable chemical, safety precautions must be observed when handling it, as it can pose risks similar to other aromatic amines.

In summary, 8-aminonaphthalene-2-sulfonic acid is more than just a compound; it's a significant player in the fields of chemistry and biology. Its versatile nature leads to numerous applications, making it an intriguing subject of study for chemists and students alike.

Synonyms
119-28-8
1-Naphthylamine-7-sulfonic acid
8-Amino-2-naphthalenesulfonic acid
8-AMINONAPHTHALENE-2-SULFONIC ACID
1,7-Cleve's acid
2-Naphthalenesulfonic acid, 8-amino-
Cleve's acid
1-Amino-7-naphthalenesulfonic acid
1-Amino-7-sulfonaphthalene
8-Naphthylamine-2-sulfonic acid
Cleve's theta-acid
1-Aminonaphthalene-7-sulfonic acid
C.I. 26135
UNII-21QEG50798
1-Naphthylamino-7-sulfonic acid
Cleve's .theta.-acid
NSC 4983
NSC-4983
EINECS 204-311-4
MFCD00004032
21QEG50798
CHEMBL4165941
DTXSID7059486
1,7-CLEVE'S ACID [MI]
1-aminonaphthalene-7-sulphonic acid
NSC-71784
.alpha.-Naphthylamine 7-sulfonic acid
1-amino-naphthalene-7-sulphonic acid
Cleve's thetaacid
8-Amino-2-naphthalenesulfonic Acid; 1-Naphthylamine-7-sulfonic Acid;1-Amino-7-sulfonaphthalene; 1,7-Cleve's Acid;
8-Aminonaphthalene-2-sulphonic acid
Cleves acid-1,7
1Amino7sulfonaphthalene
1-naphthylamine-7-sulfonic
1Naphthylamine7sulfonic acid
8Naphthylamine2sulfonic acid
NCIOpen2_003728
BIDD:GT0294
SCHEMBL156486
1Aminonaphthalene7sulfonic acid
8Amino2naphthalenesulfonic acid
8Aminonaphthalene2sulphonic acid
DTXCID0033463
NSC4983
2Naphthalenesulfonic acid, 8amino
8-Amino-2-naphthalenesulfonicacid
8-amino-2-naphthalenesulphonic acid
alpha-Naphthylamine 7-sulfonic acid
BDBM50282518
STL453579
AKOS015897376
AC-20129
AS-12904
DB-014805
8-Amino-2-naphthalenesulfonic acid, >=97%
A0356
CS-0214810
NS00020936
D78349
EN300-195489
AE-562/43461530
Q27253569
Z1509507773
204-311-4