1-octanol
Structural formula | |||||||||||||||||||
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General | |||||||||||||||||||
Surname | 1-octanol | ||||||||||||||||||
other names |
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Molecular formula | C 8 H 18 O | ||||||||||||||||||
Brief description |
colorless liquid |
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properties | |||||||||||||||||||
Molar mass | 130.23 g mol −1 | ||||||||||||||||||
Physical state |
liquid |
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density |
0.817 g cm −3 (20 ° C) |
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Melting point |
−16 ° C |
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boiling point |
195 ° C |
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Vapor pressure |
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solubility |
very bad in water (0.54 g l −1 at 25 ° C) |
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Refractive index |
1.4295 (20 ° C) |
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safety instructions | |||||||||||||||||||
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MAK |
DFG / Switzerland: 10 ml m −3 or 54 mg m −3 |
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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 |
1-Octanol (short octanol or octanol ) is a chemical compound from the group of aliphatic alcohols . It is also a primary alcohol. In addition to 1-octanol, there are other isomers of octanol, for example 2-octanol , 3-octanol and 4-octanol .
properties
1-Octanol is a clear, colorless liquid with a characteristic odor that boils at 195 ° C under normal pressure . According to Antoine, the vapor pressure function results from log 10 (P) = A− (B / (T + C)) (P in bar, T in K) with A = 6.47682, B = 2603.359 and C = −48.799 in the temperature range from 293 to 353 K and with A = 3.74844, B = 1196.639 and C = −149.043 in the temperature range from 352.1 to 468.5 K. Above the flash point temperature, the compound forms flammable vapor-air mixtures. It has a flash point of 81 ° C. The lower explosion limit (LEL) is 0.8 vol.% (43 g / m 3 ). According to the vapor pressure function, the result is a lower explosion point of 77.5 ° C and an upper explosion point of 107 ° C. The limit gap width was determined to be 0.95 mm. This results in an assignment to explosion group IIA. The ignition temperature is 245 ° C. The substance therefore falls into temperature class T3. The solubility of water in 1-octanol is 48.9 mg g −1 at 298.15 K.
use
1-Octanol is processed into esters that are used as fragrances . With the octanol / water partition coefficient , which is used in environmental chemistry , ecotoxicology and pharmacokinetics to estimate the behavior of a substance, 1-octanol represents the natural organic phase.
Individual evidence
- ↑ Entry on CAPRYLYL ALCOHOL in the CosIng database of the EU Commission, accessed on February 25, 2020.
- ↑ a b c d e f g h i j k l m n o p q Entry on 1-octanol in the GESTIS substance database of the IFA , accessed on January 5, 2018(JavaScript required) .
- ↑ AFM Barton: Alcohols with Water. In: International Union of Pure and Applied Chemistry. Solubility Data Series. Volume 15, 1984, p. 438.
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-404.
- ↑ G. Geiseler, J. Fruwert, R. Hüttig: vapor pressure and vibration behavior of the positional n-octanols and hydroxydeuterierten n-octanols. In: Chem. Ber. 99, 1966, pp. 1594-1601, doi: 10.1002 / cber.19660990525 .
- ^ HR Kemme, SI Kreps: Vapor pressure of primary n-alkyl chlorides and alcohols. In: J. Chem. Eng. Data . 14, 1969, pp. 98-102, doi: 10.1021 / je60040a011 .
- ↑ a b c d E. Brandes, W. Möller: Safety-related parameters. Volume 1: Flammable Liquids and Gases. Wirtschaftsverlag NW - Verlag für neue Wissenschaft, Bremerhaven 2003.
- ^ E. Brandes, M. Mitu, D. Pawel: The lower explosion point - A good measure for explosion prevention: Experiment and calculation for pure compounds and some mixtures. In: J. Loss Prev. Proc. Ind. 20, 2007, pp. 536-540, doi: 10.1016 / j.jlp.2007.04.028 .
- ↑ Brian E Lang: Solubility of Water in octane-1-ol from (275 to 369) K . In: Journal of Chemical and Engineering Data . tape 57 , no. 8 , 2012, p. 2221–2226 , doi : 10.1021 / je3001427 .