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Tobias acid

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Identification
Molecular formula
C17H15NO9S3
CAS number
81-16-3
IUPAC name
4-amino-5-(p-tolylsulfonyloxy)naphthalene-2,7-disulfonic acid
State
State

Tobias acid is typically encountered as a solid at room temperature, which is commonly used in dye manufacturing processes.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
305.00
Boiling point (Kelvin)
578.15
General information
Molecular weight
471.49g/mol
Molar mass
471.4890g/mol
Density
2.1002g/cm3
Appearence

It typically appears as a white or light-colored solid powder.

Comment on solubility

Solubility of 4-amino-5-(p-tolylsulfonyloxy)naphthalene-2,7-disulfonic acid

4-amino-5-(p-tolylsulfonyloxy)naphthalene-2,7-disulfonic acid is an intriguing compound with distinctive solubility properties. Understanding its solubility can provide insight into its potential applications. Here are some key points regarding its solubility:

  • Water Solubility: Due to the presence of multiple sulfonic acid groups, this compound is expected to exhibit high solubility in water. The sulfonic acid groups enhance its ionic character, making the molecule more hydrophilic.
  • Organic Solvents: Solubility in organic solvents may vary. Generally, compounds with high aromatic content, like this one, tend to have reduced solubility in non-polar organic solvents due to their polar nature.
  • Temperature Influence: The solubility of organic compounds often increases with temperature; thus, in practical applications, heating may be beneficial for maximizing solubility in various solvents.
  • pH Dependence: The solubility can also depend on the pH of the solution. In acidic or neutral conditions, the sulfonic acid groups can remain protonated, enhancing water solubility, while in alkaline conditions, deprotonation can alter solvation dynamics.

As a general rule, compounds like 4-amino-5-(p-tolylsulfonyloxy)naphthalene-2,7-disulfonic acid, which possess multiple polar functional groups, demonstrate enhanced solubility in polar solvents such as water. Thus, its application in various aqueous environments is promising.

Interesting facts

Interesting Facts about 4-amino-5-(p-tolylsulfonyloxy)naphthalene-2,7-disulfonic acid

4-amino-5-(p-tolylsulfonyloxy)naphthalene-2,7-disulfonic acid is a fascinating compound known for its versatility in various applications. Here are some intriguing points worth noting:

  • Unique Structure: This compound features a naphthalene backbone, which is a fused ring system. The presence of multiple sulfonic acid groups contributes to its solubility and reactivity in aqueous environments.
  • Biological Significance: Compounds with amino groups like this one are often studied for their potential as dyes or in therapeutic applications due to their ability to interact with biomolecules.
  • Environmental Role: Sulfonic acids can behave as surfactants, making this compound of interest in studies related to environmental chemistry, particularly in the behavior of pollutants.
  • Versatile Applications: The compound is used in various fields, including:
    • Dyes and pigments manufacturing thanks to its vivid color properties.
    • Analytical chemistry for the determination of metal ions due to its ability to form complexes.
    • Research in organic synthesis for developing novel compounds.
  • Safety Considerations: Like many sulfonic acids, proper safety measures should be observed when handling this compound, as it can be corrosive and irritating to skin and eyes.

These characteristics make 4-amino-5-(p-tolylsulfonyloxy)naphthalene-2,7-disulfonic acid a subject of great interest in both academic research and industrial applications. Its potential continues to encourage further studies and innovations.

Synonyms
NSC16168
6837-93-0
Kyselina o-tosyl-h
2,7-Naphthalenedisulfonicacid, 4-amino-5-[[(4-methylphenyl)sulfonyl]oxy]-
4-amino-5-(4-methylphenyl)sulfonyloxynaphthalene-2,7-disulfonic acid
4-AMINO-5-(TOSYLOXY)NAPHTHALENE-2,7-DISULFONIC ACID
NSC-16168
1-Amino-3,6-disulfo-8-naftylester kyselina p-toluensulfonove
2,7-NAPHTHALENEDISULFONIC ACID, 4-AMINO-5-HYDROXY-, p-TOLUENESULFONATE (ester)
Kyselina O-tosyl-H [Czech]
NSC 16168
BRN 3124026
Compound 16168
1-Amino-3,6-disulfo-8-naftylester kyselina p-toluensulfonove [Czech]
Kyselina 8-p-toluensulfonyloxy-1-naftylamin-3,6-disulfonova [Czech]
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid p-toluenesulfonate (ester)
NCIStruc1_001257
NCIStruc2_001017
2-14-00-00503 (Beilstein Handbook Reference)
CHEMBL1741448
SCHEMBL13994998
BDBM26620
DTXSID00218502
ZIQWUYNDHGXLIN-UHFFFAOYSA-N
Kyselina 8-p-toluensulfonyloxy-1-naftylamin-3,6-disulfonova
GAA83793
NCI16168
CCG-37295
NCGC00013210
2,7-Naphthalenedisulfonic acid, 4-amino-5-(((4-methylphenyl)sulfonyl)oxy)-
AKOS040742316
NCGC00013210-02
NCGC00096331-01
DA-66234
MS-28771
NCI60_001202
WLN: L66J BZ DSWQ HSWQ JOSWR D1
HY-100690
2, 4-amino-5-hydroxy-, p-toluenesulfonate
CS-0019977
G13037
2, 4-amino-5-[[(4-methylphenyl)sulfonyl]oxy]-
2, 4-amino-5-hydroxy-, p-toluenesulfonate (ester)
4-amino-5-(((4-methylphenyl)sulfonyl)oxy)-2,7-naphthalenedisulfonic acid
4-amino-5-{[(4-methylbenzene)sulfonyl]oxy}naphthalene-2,7-disulfonic acid