Aldehyde C11 undecylene
CAS: 112-45-8
Identifiers
Manufacturer
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CAS number
112-45-8
CAS (all sources)
112-45-8
CAS (Perfumiarz)
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CAS (PerfumersWorld)
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CAS (FraterWork)
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CAS (EU Hekserij)
112-45-8
CAS (TSCA Hekserij)
112-45-8
INCI name (FraterWork)
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IUPAC name (FraterWork)
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INCI (Hekserij)
UNDECYLENAL
EC number (Hekserij)
203-973-1
FEMA (Hekserij)
3095
UN number
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Synonyms (PerfumersWorld)
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Synonyms (FraterWork)
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Usage
Use (Hekserij)
Aldehyde C11 undecylene has the signature aldehyde scent: oily, soapy with
aspects of citrus and rose. The scent is strong, making a dilution of, for
example, 10% or even 1% can therefore be useful. Normally we advise not to
dilute in alcohol, but for aldehydes this is a good choice, because this makes
the substance more stable. Of course it is also possible with cosmetic hair
water and only if the end product is compatible with alcohol. Typical use is for
highlighting wood and fresh floral scents. You usually use between a trace and
0,5% of this substance in the fragrance composition, for soap it can be more.
Perfumes with aldehydes often take a long time to mature before the scent is
right: 2-3 months is no exception. It is often seen as a top note in perfumes
because the scent in the top is very distinctive. Looking purely at
substantivity it is a real base note. It can be used in difficult products such
as soap and acidic products, although a slightly higher dosage is recommended:
up to 2%.
Physical properties
Properties (Hekserij)
Aldehyde C11 undecylene is a colourless to pale yellow liquid at room
temperature. The purity is at least 97%. The substance does not have a long
shelf life: our advice is to replace the stock at least once a year. The shelf
life is considerably increased by making a solution of, for example, 10% in
alcohol (or cosmetic hair water) immediately after receipt. Only do this if the
final product is compatible with alcohol.
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