Jojoba ester
3192035
213948605
2008-05-21T14:04:32Z
IJEC
7139555
simplify
'''Jojoba esters''' are the [[hydrogenation]] or [[transesterification|interesterification]] product of [[Jojoba oil]]. Interesterified Jojoba Esters are commonly used in [[cosmetics|cosmetic]] formulations as an [[emollient]], due to its remarkable similarity to the natural [[sebum|oils produced by the human skin]], and its high oxidative stability. Fully hydrogenated jojoba esters are most often small beads used to [[exfoliation (cosmetology)|exfoliate]] the skin.
=== Chemical structure ===
Jojoba esters are proper waxes; there is no [[triglyceride]] component of jojoba esters.
Chemically, jojoba esters are a complex mixture of long chain (C36-C46) [[fatty acid]]s and [[fatty alcohol]]s joined by an ester bond. Jojoba esters are produced by the interesterification of jojoba oil, [[hydrogenation|hydrogenated]] jojoba oil, or a mixture of the two. Pure jojoba oil and pure [[Hydrogenated Jojoba Oil|hydrogenated jojoba oil]] are also correctly described as jojoba esters. The [[Cosmetic, Toiletry and Fragrance Association|CTFA]] does not regard ''partially''-hydrogenated jojoba oil as jojoba esters. For this reason, jojoba esters must not contain any trans-unsaturation. Jojoba esters' chemical structure is very similar to that of human [[sebum]] and of [[whale oil]].
=== Physical properties ===
Physically, jojoba esters are an odourless, colourless liquid, white cream, or hard white wax, with melting points ranging from 15°C to 70°C. Their texture and crystallinity may be modified by rapid cooling, thus altering their cosmetic properties. Jojoba esters are very resistant to [[oxidation]], more so than [[castor oil]], [[coconut oil]], [[macadamia|macadamia oil]], even many fractions of [[mineral oil]].
=== Uses ===
Jojoba esters are mainly used as emollients in [[cosmetics]] such as [[lipstick]]s, [[shampoos]] and moisturizing lotions. Jojoba esters may be [[Ethoxylation|ethoxylated]] to form such water-soluble materials as [[PEG-150 Jojoba]], [[PEG-120 Jojoba]] or [[PEG-80 Jojoba]]. Jojoba esters are excellent botanical substitutes for [[whale oil]] and its derivatives, such as [[cetyl alcohol]] and [[spermaceti]].
=== External links ===
*[http://www.ijec.net/ijec_glossary.html International Jojoba Export Council]
[[Category:Cosmetic chemicals]]
[[Category:Waxes]]