Stearyl alcohol, or 1-octadecanol, is an organic compound classified as a saturated fatty alcohol with the formula CH3(CH2)16CH2OH. It takes the form of white granules or flakes, which are insoluble in water. It has a wide range of uses as an ingredient in lubricants, resins, perfumes, and cosmetics. It is used as an emollient, emulsifier, and thickener in ointments, and is widely used as a hair coating in shampoos and hair conditioners. Stearyl heptanoate, the ester of stearyl alcohol and heptanoic acid (enanthic acid), is found in most cosmetic eyeliners. Stearyl alcohol has also found application as an evaporation suppressing monolayer when applied to the surface of water.[2]
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| Names | |
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| Preferred IUPAC name
Octadecan-1-ol | |
| Other names
1-octadecanol
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| Identifiers | |
3D model (JSmol)
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| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.003.652 |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| C18H38O | |
| Molar mass | 270.49 g/mol |
| Appearance | White solid |
| Density | 0.812 g/cm3 |
| Melting point | 59.4 to 59.8 °C (138.9 to 139.6 °F; 332.5 to 332.9 K) |
| Boiling point | 210 °C (410 °F; 483 K) at 15 mmHg (2.0 kPa) |
| 1.1×10−3 mg/L | |
| Hazards | |
| Flash point | 185 °C (365 °F; 458 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Stearyl alcohol is prepared from stearic acid or certain fats by the process of catalytic hydrogenation. It has low toxicity.[3]
References
edit- ^ Merck Index, 11th Edition, 8762.
- ^ Prime, E. L., Tran, D. N., Plazzer, M., Sunartio, D., Leung, A. H., Yiapanis, G., ... & Solomon, D. H. (2012). Rational design of monolayers for improved water evaporation mitigation. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 415, 47-58.
- ^ Noweck, Klaus; Grafahrend, Wolfgang (2006). "Fatty Alcohols". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a10_277.pub2. ISBN 978-3527306732.