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| CAS号 : | 26638-43-7 |
精确质量 : | 233.97500 |
| 分子式 : | C8H7ClO4S |
logP : | 2.48150 |
| 分子量 : | 234.65700 |
PSA : | 68.82000 |
2-(氯磺酰基)苯甲酸甲酯 | |
methyl 2-chlorosulfonylbenzoate | |
26638-43-7 | |
C8H7ClO4S | |
234.65700 | |
68.82000 | |
2.48150 | |
233.97500 |
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固体
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Stable under normal temperatures and pressures.
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162.3ºC
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0-6ºC
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62-63 °C
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1.431 g/cm3
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reacts
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344.8ºC at 760 mmHg
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III
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8
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2916399090
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3261
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R14; R29; R34
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S45-S36/37/39-S30-S26-S22
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C
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品名, 成分含量, 用途, 丙烯酸、丙烯酸盐或酯应报明包装 |
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2916399090 其他芳香一元羧酸. 增值税率:17.0% 退税率:9.0% 监管条件:无 最惠国关税:6.5% 普通关税:30.0% |
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2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
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2916399090. Other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives. General tariff: |
由邻氨基苯甲酸甲酯经重氮化、置换、氯化而得。将邻氨基苯甲酸甲酯和亚硝酸钠溶液混合均匀后,滴加到10℃左右的硫酸和盐酸混合液中,控制温度不超过25℃,搅拌反应至碘化钾淀粉液呈淡紫色。将此重氮液冷至10℃,加入硫酸铜,全部溶解后通入二氧化硫,温度24℃左右,约1h析出邻亚磺酸苯甲酸甲酯。至3h后,用H酸试纸测试应无色为置换终点。加入甲苯,在30-35℃温度下通氯至终点(2%联苯胺乙醇试液测试显深墨绿色)。静置,分取有机层,得邻磺酰氯苯甲酸甲酯甲苯溶液,脱溶后即为成品。 | |
糖精钠的中间体 |