3,4-??????????
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3,4-?????????? ??
- ???
- 40-43 °C (lit.)
- ?? ?
- 281 °C (lit.)
- ??
- 1.1708 (rough estimate)
- ???
- 0.09Pa at 24℃
- ???
- 1.5260 (estimate)
- ???
- >230 °F
- ?? ??
- 2-8°C
- ???
- ???: ???? ???
- ??? ??
- ??? ?? ??? ??
- ??
- ???? ?????
- Specific Gravity
- 1.15 (liquid)
- ??
- ????? ??? ? 10.00%. ??? ?? ???
- ?? ??
- ?? ??
- ???? ??
- synthetic
- ???
- 22&C?? <0.1g/100mL
- ??
- Air Sensitive
- Merck
- 14,9951
- JECFA Number
- 877
- BRN
- 473899
- ???
- ????. ???, ????? ???? ????.
- LogP
- 0.8 at 25℃
- CAS ??????
- 120-14-9(CAS DataBase Reference)
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | Xn,Xi | ||
|---|---|---|---|
| ?? ???? ?? | 22-38-36/37/38-36/38 | ||
| ????? | 26-22-24/25-36 | ||
| WGK ?? | 3 | ||
| RTECS ?? | YX5088000 | ||
| F ?????? | 9-23 | ||
| TSCA | Yes | ||
| HS ?? | 29124900 | ||
| ?? | LD50 orally in Rabbit: 2000 mg/kg LD50 dermal Rabbit > 5000 mg/kg | ||
| ???? ?? | KE-11032 |
3,4-?????????? C??? ??, ??, ??
??? ??
Veratraldehyde is a crystalline solid (mp 44.5–45°C) with a woody, vanillalike odor.Veratraldehyde can be prepared by methylation of vanillin. It is used in oriental and warm, woody fragrances, as well as in flavor compositions for vanilla notes. It is an intermediate in, for example, the synthesis of pharmaceuticals.
??
Reported among the constituents of the essential oils of Cymbopogon javanensis and Eryngium poterium. Also reported found in raspberry, ginger, peppermint oil, Bourbon vanilla and mastic gum oil.??
Veratraldehyde was used in the preparation of 4-chloromethyl-2-(dimethoxyphenyl)-1,3-dioxolane. It was used in the synthesis of (+)-lithospermic acid, having anti-HIV activity. It forms 1:1 inclusion complexes with cyclodextrins. It reacts with 3-acetyl-2,5-dimethythiophene to yield chalcone dye, (2E)-3-(3,4-Dimethoxyphenyl)-1-(2,5-dimethylthiophen-3-yl)prop-2-en-1-one.?? ??
Prepared from vanillin by methylation of vanillin with dimethylsulfate under mildly alkaline conditions.?? ??
Needles or chunky light peach powder. Has an odor of vanilla beans.??? ?? ??
Insoluble in water.?? ???
Veratraldehyde is incompatible with strong oxidizing agents and strong bases. . Veratraldehyde is an aldehyde. Aldehydes are readily oxidized to give carboxylic acids. Flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction).????
Veratraldehyde is probably combustible.Purification Methods
Crystallise the ether from diethyl ether, pet ether, CCl4 or toluene. [Beilstein 8 IV 1765.]3,4-?????????? ?? ?? ? ???
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3,4-?????????? ?? ??
???( 907)?? ??
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