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| CAS号 : | 576-22-7 |
精确质量 : | 183.98900 |
| 分子式 : | C8H9Br |
logP : | 3.06590 |
| 分子量 : | 185.06100 |
PSA : | 0.00000 |
2-溴-1,3-二甲苯 | |
2-Bromo-1,3-dimethylbenzene | |
576-22-7 | |
C8H9Br | |
185.06100 | |
0.00000 | |
3.06590 | |
183.98900 |
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n20/D 1.555(lit.)
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透明略黄色液体
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库房通风低温干燥,与氧化剂、食品添加剂分开存放
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165 °F
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206 °C(lit.)
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−10 °C(lit.)
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1.389 g/mL at 25 °C(lit.)
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Stable at room temperature in closed containers under normal storage and handling conditions.
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CY9020000
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3
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6.1
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S26-S36-S24/25
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I; II; III
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UN 2810
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Xi
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R36/37/38
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2903999090
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2933990090
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2933990090. 其他仅含氮杂原子的杂环化合物. 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:20.0% | |
2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
5L烧杯中加入610g(5mol)2,6-二甲基苯胺及3.75L氢溴酸,迅速搅拌下冷却,使成细小结晶,外用冰盐浴冷却.控制反应温度在低于15℃,搅拌下从液面下慢慢加入385g(5.5mol)亚硝酸钠溶于400mL水的溶液。将此重氮盐溶液逐渐加入至加热的、有回流冷凝器的反应器内;放氮反应缓和后于80℃水浴上保温3h。水蒸气蒸馏或加热蒸出粗品,以10%NaOH洗三次,水洗,干燥后减压分馏,收集80~84℃(1.7~2.0kPa)馏分得680g(73%)产物。 | |
有机合成,药物中间体 |
