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| CAS号 : | 92-55-7 |
精确质量 : | 243.03800 |
| 分子式 : | C9H9NO7 |
logP : | 1.83580 |
| 分子量 : | 243.17000 |
PSA : | 111.56000 |
5-硝基糠醛二乙酸酯 | |
(5-Nitrofuran-2-yl)methylene diacetate | |
92-55-7 | |
C9H9NO7 | |
243.17000 | |
111.56000 | |
1.83580 | |
243.03800 |
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1.51
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黄色细结晶粉末
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141.5ºC
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310.3ºC at 760 mmHg
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89-93 °C
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1.396g/cm3
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Stable under normal temperatures and pressures.
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Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
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LU1940000
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S24/25
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Xn
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R68
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2932190090
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品名, 成分含量, 用途 |
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2932190090 其他结构上有非稠合呋喃环化合物. 增值税率:17.0% 退税率:9.0% 监管条件:无 最惠国关税:6.5% 普通关税:20.0% |
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2932190090 other compounds containing an unfused furan ring (whether or not hydrogenated) in the structure VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0% |
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2932190090. Other Compounds containing an unfused furan ring (whether or not hydrogenated) in the structure. General tariff: |
由糠醛经硝化、酯化而得。将乙酐加入反应锅,降温至-5℃,滴加加料量的1/5的混酸(硝酸与硫酸)后,再同时滴加硝酸与糠醛(1:2体积)的混合液,控制温度在0℃左右,约5-6h加完,继续滴加一部分糠醛。然后,搅拌1h,加水和碳酸钠溶液,升温至55-62℃,保温1h。冷却至15℃,过滤,用水洗涤,甩干即得成品,收率85%。 | |
是医药中间体,用于制呋喃类抗感染药(痢特灵、呋喃西林、呋喃坦丁等)。 |
