Isobutyric acid
Structural formula | ||||||||||||||||||||||
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General | ||||||||||||||||||||||
Surname | Isobutyric acid | |||||||||||||||||||||
other names | ||||||||||||||||||||||
Molecular formula | C 4 H 8 O 2 | |||||||||||||||||||||
Brief description |
colorless liquid with a characteristic odor |
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properties | ||||||||||||||||||||||
Molar mass | 88.11 g · mol -1 | |||||||||||||||||||||
Physical state |
liquid |
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density |
0.95 g cm −3 (20 ° C) |
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Melting point |
−46 ° C |
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boiling point |
155 ° C |
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Vapor pressure |
1.81 h Pa (20 ° C) |
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pK s value |
4.86 (25 ° C) |
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solubility |
moderate in water (210 g l −1 at 20 ° C) |
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Refractive index |
1.3920 (20 ° C) |
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safety instructions | ||||||||||||||||||||||
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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 |
Isobutyric acid is a chemical compound used as an additive in the cosmetics and food industries and as an intermediate in general in the chemical industry. It is an isomer of butyric acid .
Extraction and presentation
Isobutyric acid can be produced, among other things, by the oxidation of isobutyraldehyde .
use
Isobutyric acid is found as an additive in cosmetics. It is suitable as a polar solvent for various chemical reactions. The salts of isobutyric acid are used in textile auxiliaries, tanning agents, stabilizers and preservatives. Isobutyric acid can be used as an intermediate in the manufacture of herbicides as well as paint and plastic raw materials. The esters of isobutyric acid with monofunctional alcohols are used as fragrances and flavorings (e.g. some of the compounds have a pineapple-like odor).
safety instructions
Vapors cause irritation of the eyes, the respiratory tract, the lungs and the skin, narcotic effects through high concentrations. Contact with the liquid is severely irritating to the eyes and skin.
Web links
- Isobutyric acid data sheet from Celanese Chemicals Europe GmbH (PDF file; 77 kB)
Individual evidence
- ↑ Entry on ISOBUTYRIC ACID in the CosIng database of the EU Commission, accessed on August 10, 2020.
- ↑ Entry on isobutyric acid. In: Römpp Online . Georg Thieme Verlag, accessed on May 30, 2016.
- ↑ a b c d e f g Entry on isobutyric acid in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
- ↑ a b CRC Handbook of Tables for Organic Compound Identification , Third Edition, 1984, ISBN 0-8493-0303-6 .
- ↑ Entry on isobutyric acid in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .