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| CAS号 : | 1124-11-4 |
精确质量 : | 136.10000 |
| 分子式 : | C8H12N2 |
logP : | 1.71020 |
| 分子量 : | 136.19400 |
PSA : | 25.78000 |
川芎嗪 | |
Tetramethylpyrazine | |
1124-11-4 | |
C8H12N2 | |
136.19400 | |
25.78000 | |
1.71020 | |
136.10000 |
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1.503
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白色晶体或粉末
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128-130°C/200mm
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190 °C(lit.)
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77-80 °C(lit.)
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1.08
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0.671mmHg at 25°C
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Stable. Incompatible with strong acids, strong oxidizing agents.
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Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
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GHS05, GHS07 | |
危险 | |
H302; H315; H318; H335 | |
P261; P280; P305 + P351 + P338 | |
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UQ3905000
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3
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29339990
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S26-S39-S24/25
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Xn
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R22
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2933990090
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2933990090. 其他仅含氮杂原子的杂环化合物. 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% | |
2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
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由丁酮与亚硝酸乙酯缩合生成丁二酮单肟,再经还原、环合而得甲甲基吡嗪。环合反应产物进行水蒸气蒸馏,馏出物冷却、结晶、过滤,得四甲基吡嗪粗品。精制时采用水重结晶和活性炭脱色。制备其盐酸盐时,可将其在丙酮中滴加含15%-20%氯化氢的乙醇溶液成盐。 | |
用作调味剂、酒精饮料的甜味增强剂、卷烟的矫味剂和增补剂。 |
