4-氯苯磺酸

4-氯苯磺酸

4-Chlorobenzenesulfonic acid

98-66-8

C6H5ClO3S

192.62000

62.75000

2.66750

191.96500

淡灰色晶体

108ºC

149 °C22 mm Hg(lit.)

102 °C

1.551g/cm3

Stable. Incompatible with strong oxidizing agents.

Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area.

DB5074000

8

3

S26-S27-S28-S36/37/39-S45-S24/25

III

UN 2583 8/PG 2

C

R22; R34

2904909090

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>(1)由对氨基苯磺酸经重氮化、消除而得将对氨基苯磺酸、盐酸加入水中,冷却至20℃以下,滴加亚硝酸钠溶液,反应到终点即得重氮液。另将硫酸铜、氯化钠加入约80℃的水中,待全部溶解后滴加碱性亚硫酸钠溶液。加毕反应20min,冷至室温,静置,将沉淀用倾泻法清洗,加盐酸溶解,冷至0℃以下,滴加上述重氮液,即生成对氯苯磺酸。将反应液升温至80℃,加食盐盐析,过滤可得对氯苯磺酸钠。<br>(2)由氯苯经磺化而得在反应锅内加入98%浓硫酸及10%发烟硫酸,搅拌15min,逐渐加入干燥的氯苯,在95-100℃搅拌反应5h,检查磺化终点。到达终点时反应物酸度不大于70%,能在水中溶解完全。</p>

<p>用作医药、染料中间体。</p>