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| CAS号 : | 3438-16-2 |
精确质量 : | 186.00800 |
| 分子式 : | C8H7ClO3 |
logP : | 2.04680 |
| 分子量 : | 186.59200 |
PSA : | 46.53000 |
5-氯-2-甲氧基苯甲酸 | |
5-Chloro-2-methoxybenzoic acid | |
3438-16-2 | |
C8H7ClO3 | |
186.59200 | |
46.53000 | |
2.04680 | |
186.00800 |
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白色至灰白色结晶粉末
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1.544-1546
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140.9ºC
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98-100 °C(lit.)
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1.352 g/cm3
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309.4ºC at 760 mmHg
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2918990090
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3
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R36/37/38
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S26-S37/39
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Xi
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HS: 2918990090 Other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives |
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品名, 成分含量, 用途 |
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2918990090. 其他含其他附加含氧基羧酸（包括酸酐、酰卤化物、过氧化物和过氧酸及该税号的衍生物）. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:30.0% |
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2918990090. other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
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水杨酸经氯化、甲基化而得。将水杨酸溶于氯苯中，在日光灯照射下，在55-80℃通氯。氯化结束，冷却，过滤，干燥，得5-氯水杨酸。将其加入氢氧化钠溶液中，搅拌下滴加硫酸二甲酯，并续加氢氧化钠溶液使反应液pH在10-12，保持温度在35℃以下。加毕，于26-35℃保温8h。趁热过滤，滤液用15%盐酸调节pH至2-3，放冷、过滤、洗涤、干燥得5-氯-2-甲氧基苯甲酸。 | |
医药中间体。 |
