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| CAS号 : | 94-26-8 |
精确质量 : | 194.09400 |
| 分子式 : | C11H14O3 |
logP : | 2.34910 |
| 分子量 : | 194.22700 |
PSA : | 46.53000 |
对羟基苯甲酸丁酯 | |
Butylparaben | |
94-26-8 | |
C11H14O3 | |
194.22700 | |
46.53000 | |
2.34910 | |
194.09400 |
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白色结晶粉末
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1.562
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Stable. Combustible. Incompatible with strong oxidizing agents, strong alkalies.
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129.2ºC
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库房通风低温干燥
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67-70 °C(lit.)
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1.28
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156-157 °C3.5 mm Hg(lit.)
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2918290000
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2
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R36/37/38
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S22-S24/25
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DH1980000
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HS: 2918290000 Other carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives |
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品名, 成分含量, 用途 |
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A.入境货物通关单 B.出境货物通关单 |
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R.进口食品卫生监督检验 S.出口食品卫生监督检验 |
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2918290000 其他含酚基但不含其他含氧基羧酸及其酸酐、酰卤化物、过氧化物和过氧酸及它们的衍生物。监管条件:AB(入境货物通关单,出境货物通关单)。增值税率:17.0%。退税率:9.0%。最惠国关税:6.5%。普通关税:30.0% |
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HS: 2918290000 other carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) VAT:17.0% MFN tariff:6.5% General tariff:30.0% |
1.由对羟基苯甲酸与丁醇酯化而得。将丁醇、对羟基苯甲酸一起加热溶解,慢慢滴加硫酸,加完后继续回流反应8h。放冷,加入4%碳酸钠溶液中,分出水层,通蒸气赶出丁醇,放冷,过滤得粗品,再用乙醇重结晶(在乙醇中的溶解度:200g/100ml)。 | |
本品主要用作有机合成中间体,医药、食品、化妆品、胶片及高档产品的防腐剂、抑菌剂。 |