Terpinoles
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Terpinoles | |||||||||||||||
other names |
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Molecular formula | C 10 H 16 | |||||||||||||||
Brief description |
colorless liquid |
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properties | ||||||||||||||||
Molar mass | 136.23 g mol −1 | |||||||||||||||
density |
0.86 g cm −3 (20 ° C) |
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Melting point |
<25 ° C |
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boiling point |
186 ° C |
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solubility |
almost insoluble in water (9.5 mg l −1 at 23 ° C) |
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Refractive index |
1.4888 |
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safety instructions | ||||||||||||||||
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Toxicological data | ||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C |
Terpinolene belongs to the naturally occurring group of menthadienes , that is, terpenes with a p-menthane structure and two double bonds . These occur in numerous isomeric forms in essential oils . Terpinolene is found in traces in Vitis vinifera , parsley roots and in a few other plants. Here it is produced via a (-) - α- terpineol synthase ( terpene synthase ). Parsnip oil is particularly rich in terpinol, which contains between 40 and 70 percent. Terpinolene is also a termite alarm pheromone .
The α-terpinolene is also known inconsistently as δ-terpinene and is therefore one of the isomeric terpinenes .
properties
Terpinolene is a colorless liquid that, like all menthadienes, is sensitive to light, air and heat. According to Antoine, the vapor pressure function results from log 10 (P) = A− (B / (T + C)) (P in bar, T in K) with A = 2.95742, B = 934.936 and C = −146.641 in the temperature range from 313.6 K to 452 K.
The compound forms flammable vapor-air mixtures above the flash point. The flash point is around 53 ° C.
use
Terpinolene is used as an additive in furniture polishes and shoe care products.
Individual evidence
- ↑ Terpinolen data sheet (PDF) from Carl Roth , accessed on December 14, 2010.
- ^ A b R. T. O'Connor, LA Goldblatt: Correlation of Ultraviolet and Infrared Spectra of Terpene Hydrocarbons , in: Anal. Chem. , 1954 , 26 , pp. 1726-1737; doi : 10.1021 / ac60095a014 .
- ↑ a b c d Entry on terpinolene in the ChemIDplus database of the United States National Library of Medicine (NLM) .
- ↑ a b Entry on p-Mentha-1,4 (8) -diene in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
- ↑ The chemistry of parsley (Bernhard Peter and Stephanie Brach)
- ↑ Liber Herbarum Minor
- ↑ a b c Entry on p-menthadiene. In: Römpp Online . Georg Thieme Verlag, accessed on June 13, 2014.
- ↑ Pickett, OA; Peterson, JM: Terpenes and Terpene Alcohols. I. Vapor Pressure-Temperature Relationships , in: Ind. Eng. Chem. , 1929 , 21 , pp. 325-326.
- ^ E. Brandes, W. Möller: Safety-related parameters - Volume 1: Flammable liquids and gases , Wirtschaftsverlag NW - Verlag für neue Wissenschaft GmbH, Bremerhaven 2003.