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| CAS号 : | 498-21-5 |
精确质量 : | 132.04200 |
| 分子式 : | C5H8O4 |
logP : | 0.18180 |
| 分子量 : | 132.11500 |
PSA : | 74.60000 |
甲基丁二酸 | |
2-Methylsuccinic acid | |
498-21-5 | |
C5H8O4 | |
132.11500 | |
74.60000 | |
0.18180 | |
132.04200 |
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1.474
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白色至米色结晶粉末
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110-115 °C(lit.)
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1.4105 g/cm3
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0.0162mmHg at 25°C
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Stable. Combustible. Incompatible with bases, oxidizing agents, reducing agents.
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Store in a cool, dry place. Store in a tightly closed container.
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3
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S26-S36
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Xi
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R36/37/38
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2917190090
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品名, 成分含量, 用途, 对苯二甲酸请注明4-CBA值, 对苯二甲酸请注明P-TL酸值, 对苯二甲酸请注明色度, 对苯二甲酸请注明水分 |
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2917190090 其他无环多元羧酸. 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:30.0% |
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2917190090 acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
1.以丁烯酸为原料,经以下步骤制得。将丁烯酸和乙醇与四氯化碳混合,添加硫酸,回流反应12h,回收乙醇和四氯化碳,并盐析得到巴豆酸乙酯。将巴豆酸乙酯、乙醇与氰化钠水溶液回流反应5h。再加入氢氧化钡溶液,经减压浓缩至粥状,冷却。加入硝酸,剧烈反应放出氰化氢气体。减压浓缩至干,用苯、乙醚提取后得粗品,最后用苯、水重结晶各一次,即得成品。 | |
用于有机合成。 |