2,5-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine and 2,7-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine;
| 名称： | 2,5-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine and 2,7-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine; |
| 别名： | 38917-61-2
38917-62-3
Mixture of 2,5 and 2,7-Dimethyl-6,7-dihydro-5H-cyclopentapyrazine
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| 分子式： | C9H12N2 |
| 分子量： | 148.2 |
| COE编码： | 11309, 11310 |
| FEMA： | 4702 |
| FLAVIS： | 14.098, 14.161 |
| JECFA： | 2128 |
JECFA信息：
| 最近的JECFA评价的日期和会议次数： | 2012 (Session 76) | | 质量规格的状况： | Full | | 物理形状/气味： | Colourless to pale yellow liquid; Roasted coffee aroma | | 溶解度： | Practically insoluble to insoluble in water | | 乙醇中溶解度： | Soluble | | 沸点(℃)： | 230-231℃ | | 最低检测值%： | 95% | | 折射系数： | 1.524-1.532 | | 比重： | 1.020-1.030 | | 其他要求： | 2,5-isomer (60-75%); 2,7-isomer (35-40%) | | 验证实验： | MS IR HNMR | 光谱图：
![2,5-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine and 2,7-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine;光谱图1](http://www.cnreagent.com/data/flavors/jecfa/jecfa76/2128-hnmr.gif)
![2,5-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine and 2,7-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine;光谱图2](http://www.cnreagent.com/data/flavors/jecfa/jecfa76/2128-ir.gif)
![2,5-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine and 2,7-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine;光谱图3](http://www.cnreagent.com/data/flavors/jecfa/jecfa76/2128-ms.gif)
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