2,3-二甲基溴苯

2,3-二甲基溴苯

2,3-Dimethylbromobenzene

576-23-8

C8H9Br

185.06100

0.00000

3.06590

183.98900

n20/D 1.560(lit.)

透明无色至淡黄色液体

177 °F

214 °C(lit.)

21ºC

1.365 g/mL at 25 °C(lit.)

Stable at room temperature in closed containers under normal storage and handling conditions.

Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

3

6.1

S26-S36/37/39-S24/25

I; II; III

UN 2810 6.1/PG 3

Xi

R36/37/38

2903999090

2933990090

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%

<p>在装有搅拌、回流管、温度计的3L四口瓶中加入邻二甲苯106g(1mol)和107mL(1.97mol)98%的浓硫酸,然后搅拌加热于100℃反应1.5h,冷却至室温。加入1500mL水搅拌溶解后,在搅拌下用473g水合氢氧化钡与750mL水的碱液中和至pH7。趁热过滤,将滤液倒入3L三口瓶中,在搅拌下于50~60℃加入溴素192g(1.2mol)、溴化钡200g,水700mL,并于50~60℃搅拌反应15h。然后冷却,过滤,用水200mL×2洗涤,真空干燥,得3-溴-邻二甲苯磺酸钡盐约231g,收率69%。</p>

<p>用做有机合成中间体。</p>