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| 融点 | 124 °C | | 沸点 | 317.43°C (rough estimate) | | 比重(密度) | 1.44 g/cm | | 蒸気圧 | 2.33Pa at 20℃ | | 屈折率 | 1.4998 (estimate) | | 貯蔵温度 | Inert atmosphere,Room Temperature | | 溶解性 | water: freely soluble(lit.) | | 外見 | solid | | 酸解離定数(Pka) | 0.27±0.10(Predicted) | | 色 | White | | 水溶解度 | Soluble in water. | | Sensitive | Hygroscopic | | Merck | 6377 | | LogP | -0.944 at 23℃ | | CAS データベース | 120-18-3(CAS DataBase Reference) | | EPAの化学物質情報 | 2-Naphthalenesulfonic acid (120-18-3) |
| 主な危険性 | C,F | | Rフレーズ | 35-34-11 | | Sフレーズ | 26-36/37/39-45-16 | | RIDADR | UN 2583 8/PG 2 | | WGK Germany | 1 | | RTECS 番号 | QK1225000 | | Hazard Note | Corrosive | | TSCA | Yes | | 国連危険物分類 | 8 | | 容器等級 | III | | HSコード | 2904100090 |
| | 2-ナフタレンスルホン酸水和物 Usage And Synthesis |
| 化学的特性 | Nondeliquescent, white plates.Soluble in water, alcohol, and ether. Combustible. | | 使用 | Starting point in the manufacture of β-naphthol,
β-naphtholsulfonic acid, β-naphthylaminesulfonic
acid, etc. | | 使用 | Naphthalene-2-sulfonic acid is used in making direct dyes, reactive des and employed as dye and agrochemical intermediates. | | 定義 | ChEBI: Naphthalene-2-sulfonic acid is a naphthalenesulfonic acid in which the sulfo group is linked to position 2 of the naphthalene ring. It has a role as an environmental contaminant and a xenobiotic. | | 製造方法 | Naphthalene-2-sulfonic acid is prepared by sulfonation of naphthalene.
Step: With naphthalene as raw material, 98% sulfuric acid is used as sulfonating agent, and it is obtained by sulfonation at 160-166 ℃. During the sulfonation process, a small amount of α-naphthalenesulfonic acid by-product is generated. By heating, the unstable α-naphthalenesulfonic acid can be hydrolyzed at 140-150 °C to remove the sulfonic acid group, and become naphthalene and sulfuric acid. Naphthalene can be blown out. During the hydrolysis of naphthalene, a small amount of lye should be added to neutralize part of the sulfuric acid. It also acts with naphthalenesulfonic acid to form β-naphthalenesulfonic acid sodium salt crystals, which can be filtered to obtain the finished product of Naphthalene-2-sulfonic acid. | | 一般的な説明 | The fluorescence of 2-naphthalenesulfonic acid (NSA) is effectively quenched by colloidal silver via photoinduced interfacial electron transfer from the excited singlet of NSA to silver. Adsorption behavior of NSA on a conventional macroporous resin Amberlite XAD4 and hypercrosslinked resins NDA101 and NDA100 has been investigated. | | 燃焼性と爆発性 | Non flammable | | 純化方法 | Crystallise the acid from conc HCl. The S-benzylisothiuronium salt has m 192o (from aqueous EtOH). [Berger Acta Chem Scand 8 432 1954, Beilstein 11 H 171, 11 IV 527.] |
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