每周分子 | Molecule of the Week
每周分子 | Molecule of the Week
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每周分子： 苯磺酸
Molecule of the Week:
Benzenesulfonic acid
苯磺酸是最简单的芳香族磺酸，易溶于水，p K a 为–2.8。苯磺酸早至19世纪80年代起就为人所知，其合成方法可以追溯到1916年，即通过苯与热浓硫酸反应制得 。
苯磺酸被用于生产苯酚，采用的方法为苯磺酸与氢氧化钠共熔或水解一种苯磺酸盐 (通常是钠盐) 。苯磺酸的其他用途包括用其金属盐或胺盐制成表面活性剂，以及作为阳离子药物的抗衡离子 。
苯磺酸信息速览
CAS 登记号 |
98-11-3 |
CAS SciFinder命名 |
Benzenesulfonic acid |
分子式 |
C 6 H 6 O 3 S |
摩尔质量 |
158.18 g/mol |
外观 |
易潮解的白色晶体或蜡状固体 |
熔点 |
65 °C (dec.) a |
水溶性 |
930 g/L (25 °C) |
a. 不确定；也有报道低至43 °C。
苯磺酸危害信息
GHS分类：腐蚀金属，分类1 |
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H290-可能对金属有腐蚀性 |
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GHS分类：急性毒性，口服，分类4 |
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H302-吞食有害 |
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GHS分类：对皮肤腐蚀/刺激，分类1C |
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H314-造成严重的皮肤烧伤和眼损伤 |
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GHS分类：严重眼损伤/眼刺激，分类1 |
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H318-严重眼损伤/眼刺激 |
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GHS分类：特定靶器官毒性，单次接触，呼吸道刺激，分类3 |
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H335-可能引起呼吸道刺激 |
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【 关于每周分子 】
自2001年以来，“每周分子”已成为广受欢迎的栏目。多数分子由读者推荐。每个结构都经由科学家审查，并以3-D和平面图像的形式显示，同时附有该分子简介。可以通过美国化学文摘社 (CAS) 提供的CAS SciFinder n 中的CAS REGISTRY获取“每周分子”的更多信息。CAS REGISTRY中的每条物质信息都展示了物质的CAS登记号、索引名、通用名、商品名、书目信息等其他更多信息。 发送邮件至motw@acs.org推荐您感兴趣的分子吧 。
Benzenesulfonic acid is the simplest aromatic sulfonic acid. It is highly water-soluble and a strong acid with a p K a of –2.8. It has been known since at least the 1880s; its synthesis, which goes back to 1916, is via the reaction of benzene with hot concentrated sulfuric acid .
Benzenesulfonic acid is used to produce phenol by fusing it with sodium hydroxide or hydrolyzing one of its salts, usually sodium. Other uses include surfactants made with its metal or amine salts and as a counterion for cationic pharmaceuticals .
Benzenesulfonic acid fast facts
CAS Reg. No. |
98-11-3 |
|
SciFinder nomenclature |
Benzenesulfonic acid |
|
Empirical formula |
C 6 H 6 O 3 S |
Molar mass |
158.18 g/mol |
Appearance |
Deliquescent white crystals or waxy solid |
Melting point |
65 °C a |
Water solubility |
930 g/L (25 °C) |
a. Uncertain; also reported as low as 43 °C.
Benzenesulfonic acid hazard information
Corrosive to metals, category 1 |
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H290-May be corrosive to metals |
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Acute toxicity, oral, category 4 |
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H302-Harmful if swallowed |
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Skin corrosion/irritation, category 1C |
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H314-Causes severe skin burns and eye damage |
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Serious eye damage/eye irritation, category 1 |
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H361-Causes serious eye damage |
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Specific target organ toxicity, single exposure, respiratory tract irritation, category 3 |
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H335-May cause respiratory irritation |
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About Molecule of the Week
MOTW has been a popular feature on ACS website since 2001. Many molecules are suggested by our website visitors. Every structure is reviewed by a scientist and displayed in 3-D and flat images with a brief description. Each week’s molecule also links to a sample record from the CAS REGISTRY, which is searched using CAS SciFinder n . Each record displays the registry number, index name and synonyms, bibliographic information, and more. Send us a molecule suggestion at motw@acs.org .
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