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| CAS号 : | 149-91-7 |
精确质量 : | 170.02200 |
| 分子式 : | C7H6O5 |
logP : | 0.50160 |
| 分子量 : | 170.12000 |
PSA : | 97.99000 |
没食子酸 | |
gallic acid | |
149-91-7 | |
C7H6O5 | |
170.12000 | |
97.99000 | |
0.50160 | |
170.02200 |
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1.73
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白色结晶粉末
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库房低温,通风,干燥
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271ºC
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501.1ºC at 760 mmHg
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252 °C (dec.)(lit.)
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1.694
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12 g/L cold water
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7.32E-11mmHg at 25°C
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Stability Stable, but may discolour upon exposure to light. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, acid chlorides, acid anhydrides.
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LW7525000
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2
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S26-S36-S24/25
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2918290000
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Xi
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R36/37/38
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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% |
由五倍子制得。五倍子的主要成分为单宁酸,属水解类单宁,能溶于热水,具有涩味,是和种无定形的复杂有机物。我国五倍子单宁酸是由五倍子酸、双倍酸与葡萄糖结合以甙或酯的形式形成的复杂混合物。单宁酸经加压水解即生成没食子酸和葡萄糖。水解时先生成以没食子酸酯,再由双没食子酸酯水解成没食子酸,水解温度为133-135℃,压力为0.18-0.2MPa。从升压至0.18MPa开始反应保持2h即达终点。与常压水解比较,可节约硫酸和蒸汽,生产能力可提高25%。 | |
具有抗菌作用，可治疗菌痢。具有收敛、止血、止泻作用。可用作防腐剂。可制备焦性没食子酸、药物、墨水、媒介染料和防爆剂等。还用作显影剂和检测游离无机酸、二羟基丙酮、生物碱和金属等的分析试剂。 |
