TCI N0014 Disodium 2,7-Naphthalenedisulfonate, CAS 1655-35-2, is the disodium salt of naphthalene-2,7-disulfonic acid, the isomer that carries its sulfonate groups at two beta positions on opposite sides of the naphthalene framework. The 2,7 substitution pattern gives the molecule a curved or angular shape that is distinctly different from the linear 2,6 isomer, and this difference in geometry has a real effect on synthetic outcomes as well as on the properties of materials built from it. In the laboratory the compound serves as a non-heterocyclic building block and as a reference aromatic anion in analytical work.
The properties that make this material a preferred choice begin with its high water solubility and its stability as a solid salt, together with the unambiguous positioning of its functional groups, which becomes the key consideration when researchers want to control the architecture of a target molecule. The two fully ionized sulfonate groups provide a double negative charge that is useful both for electrostatic interactions and for increasing the hydrophilicity of synthetic products. The sodium salt form is far safer to handle than the corresponding free sulfonic acid, which is corrosive. In addition, the naphthalene framework gives strong ultraviolet absorption, so detection in liquid chromatography proceeds reliably.
In Indonesian laboratories this building block is typically found in university and institutional organic synthesis groups, in materials chemistry work where sulfonated aromatic units are incorporated into larger structures, and in analytical laboratories that need a well-characterized aromatic anion. Its solid salt form suits local conditions because it can be stored and weighed without the special handling that a corrosive free acid would demand, and it dissolves readily in aqueous systems used in routine bench work.
Related TCI products
- TCI N0441 1655-29-4 Disodium 1,5-Naphthalenedisulfonate
- TCI N0029 135-51-3 Disodium 3-Hydroxy-2,7-naphthalenedisulfonate
- TCI N0013 1655-45-4 Disodium 2,6-Naphthalenedisulfonate
- TCI N0012 1655-29-4 Disodium 1,5-Naphthalenedisulfonate Hydrate
- TCI N0011 1655-43-2 Disodium 1,6-Naphthalenedisulfonate
- TCI A0337 842-15-9 Monopotassium 7-Amino-1,3-naphthalenedisulfonate Hydrate
- Non-heterocyclic building block synthesis — the defined 2,7 substitution pattern lets researchers control target molecular architecture precisely, since functional group positions are unambiguous throughout the reaction sequence.
- Sulfonated aromatic materials preparation — the angular 2,7 geometry differs from the linear 2,6 isomer, and this shape difference measurably influences the properties of materials constructed from the framework.
- Liquid chromatography reference standard — the naphthalene framework absorbs ultraviolet light strongly, allowing reliable detection in liquid chromatography without derivatization or additional labelling steps.
- Aromatic anion studies in analytical work — the two fully ionized sulfonate groups carry a double negative charge that is well suited to investigating electrostatic interactions in solution.
- Hydrophilicity modification of synthetic products — introducing this doubly sulfonated aromatic unit raises the water solubility of synthetic products, a common requirement in aqueous-phase chemistry.
| Brand | TCI |
|---|---|
| CAS number | 1655-35-2 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Building Blocks > Non-Heterocyclic Building Blocks |
| Pack sizes | available in standard TCI catalogue pack sizes; please confirm the currently listed option when ordering |
| Physical form | solid salt, highly soluble in water |
| Storage | keep as a dry solid in a closed container, protected from moisture |
- Chemical name: Disodium 2,7-Naphthalenedisulfonate, the disodium salt of naphthalene-2,7-disulfonic acid
Store this product as a dry solid in a tightly closed container, kept away from moisture, since sulfonate salts are hygroscopic in character and absorbed water complicates accurate weighing. Glass or chemically resistant plastic containers with secure closures are appropriate, and the original manufacturer packaging should be retained wherever possible so that identity and lot information remain with the material. Handle the compound in a well-ventilated area with standard laboratory personal protective equipment, including safety glasses, gloves, and a laboratory coat, and avoid generating dust when weighing the powder. Although the sodium salt form is substantially safer to handle than the corrosive free sulfonic acid, it should still be treated with normal chemical care: avoid contact with skin and eyes, do not inhale the solid, and wash hands after handling. Refer to the manufacturer's safety data sheet for complete handling guidance before first use.
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