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| CAS号 : | 528-75-6 |
精确质量 : | 196.01200 |
| 分子式 : | C7H4N2O5 |
logP : | 2.36190 |
| 分子量 : | 196.11700 |
PSA : | 108.71000 |
2,4-二硝基苯甲醛 | |
2,4-Dinitrobenzaldehyde | |
528-75-6 | |
C7H4N2O5 | |
196.11700 | |
108.71000 | |
2.36190 | |
196.01200 |
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1.66
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黄色至橙色至棕色至紫色或绿色粉末,晶体或结晶粉末
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190°C/10mm
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190 °C10 mm Hg(lit.)
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66-70 °C(lit.)
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1.571 g/cm3
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Stable under normal temperatures and pressures.
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Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator (approx 4ºC).
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CU5957000
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3
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S26-S37/39
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Xi
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R36/37/38
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2913000090
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品名, 成分含量, 用途 |
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2913000090 品目2912所列产品的其他衍生物〔指卤化,磺化,硝化或亚硝化的衍生物〕. 增值税率:17.0% 退税率:9.0% 监管条件:无 最惠国关税:5.5% 普通关税:30.0% |
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HS: 2913000090 halogenated, sulphonated, nitrated or nitrosated derivatives of products of heading 2912 Educational tariff:17.0% Tax rebate rate:9.0% Regulatory conditions:none Most favored nation tariff:5.5% General tariff:30.0% |
以N,N-二甲苯胺为起始原料,经下列步骤制得该品。将N,N-二甲苯胺和浓盐酸配成溶液,加入冰块冷至5℃。搅拌,缓缓加入亚硝酸钠溶液,保持8℃以下,1h加完,再放置1h,过滤。滤饼先用盐酸洗涤,后用乙醇洗涤,在空气中干燥,得对亚硝基二甲苯胺盐酸盐。把上述盐酸盐及无水碳酸钠加入乙醇中,加热半小时,过滤。将滤液和2,4-二硝基甲苯一起搅拌加热5h,冷却后滤出缩合物,用乙醇重结晶一次。将缩合物加入盐酸中,通入水蒸气15min,冷却,倾出水层,再加稀盐酸通入水蒸气搅拌。最好滤出固体物,水洗,在真空干燥器中干燥,得2,4-二硝基苯甲醛。性质与稳定性: | |
用于有机合成、照相、制备席夫碱(Schiff's bases)。 |
