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| CAS号 : | 1136-45-4 |
精确质量 : | 203.05800 |
| 分子式 : | C11H9NO3 |
logP : | 2.34820 |
| 分子量 : | 203.19400 |
PSA : | 63.33000 |
5-甲基-3-苯基-4-异恶唑甲酸 | |
5-Methyl-3-Phenylisoxazole-4-Carboxylic Acid | |
1136-45-4 | |
C11H9NO3 | |
203.19400 | |
63.33000 | |
2.34820 | |
203.05800 |
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奶油色至淡棕色固体
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1.578
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Stable under normal temperatures and pressures.
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174.5ºC
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5.74E-06mmHg at 25°C
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Store in a cool, dry place. Keep container closed when not in use.
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192-194 °C(lit.)
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1.273g/cm3
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365ºC at 760 mmHg
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2934999090
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3
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R22
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S24/25-S36/37-S22
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NY2750000
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Xi
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品名, 成分含量, 用途 |
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2934999090. 其他杂环化合物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:20.0% |
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2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
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2934999090. Other nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds. General tariff: |
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由苯甲氯肟与乙酰乙酸乙酯环合后水解而得。将乙酰乙酸乙酯与苯甲氯肟乙醇溶液搅拌混合,冷却至0℃,加氢氧化钠溶液调至pH为7-8,因反应放热,需冷却保持在10℃左右。再继续调至pH为9-9.5,在10℃左右反应4h。再加氢氧化钠溶液,升温蒸出乙醇直到110℃,冷却、加水,搅拌回流3h。用盐酸酸化至pH=6,除去油层后加活性炭脱色,过滤,滤液用盐酸调至pH=3.8。过滤,滤饼洗至中性,真空干燥,得5-甲基-3-苯基-4-异噁唑酸。 | |
用于苯唑青霉素钠的生产。 |
甲酮](https://www.chemicalbook.com/CAS/GIF/341001-38-5.gif)
