Product Name:2-Aminonaphthalene-1-sulfonic acid
Purity:99%
Appearance:White Powder
Sample:Available
Storage:In Cool Place
CAS No.: 81-16-3
Tobias acid Cas 81-16-3
Typical Properties
Chemical Name:2-Aminonaphthalene-1-sulfonic acid
Cas No:81-16-3
EINECS No:201-331-5
Synonyms:Tobias Acid
Molecular Weight:223.25
Molecular Formula:C10H9NO3S
Molecular Structure:
| Item | Specification |
| Melting Point | 180 °C |
| Boiling Point | 220°C |
| Density | 1.3588 |
| Refractive index | 1.525 |
| Water Solubility | 4.083g/L |
| Total Amino (dry)%≥ | 97 |
| 2-Naphthylamine | 0.25 |
| Insoluble matter %≤ | 0.1 |
Usage
It serves as a diazo component for the synthesis of various acid, reactive, direct, and azoic dyes, as well as organic pigments.
It is utilized in the preparation of key dye intermediates—such as J-acid and γ-acid—and serves as a fundamental raw material for the dye industry.
As a bifunctional naphthalene-based building block, it is employed in organic synthesis reactions involving diazotization, coupling, condensation, and ammonolysis.
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Tobias acid Cas 81-16-3