stearyl aldehyde
Isol. from the oil of hops (Humulus lupulus). Also found in the aromas of various cooked meats Stearaldehyde or octadecanal is a normal long chain fatty aldehyde that can be found in total lipid extracts of muscle tissue. Stearaldehyde can also be found in the plasma of patients with Sjogren-Larsson syndrome. Sjogren-Larsson syndrome (SLS) is an autosomal recessively inherited neurocutaneous disorder caused by a deficiency of the microsomal enzyme fatty aldehyde dehydrogenase (FALDH). (PMID 14564703, 11408337). Octadecanal is often used as the substrate of choice to test FALDH activity in patients suspected of having Sjogren-Larsson syndrome. [HMDB]
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      O0368 Octadecanal >95.0%(GC)
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octadecanal (Click)
CAS Number: 638-66-4Picture of molecule
ECHA EINECS - REACH Pre-Reg: 211-346-9
Nikkaji Web: J97.280K
XlogP3-AA: 8.10 (est)
Molecular Weight: 268.48412000
Formula: C18 H36 O
NMR Predictor: Predict (works with chrome or firefox)
Category: cosmetic agents
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Physical Properties:
Assay: 98.00 to 100.00 % 
Food Chemicals Codex Listed: No
Melting Point: 38.00 °C. @ 760.00 mm Hg
Boiling Point: 320.00 to  322.00 °C. @ 760.00 mm Hg
Vapor Pressure: 0.000300 mm/Hg @ 25.00 °C. (est)
Flash Point: 310.00 °F. TCC ( 154.44 °C. )
logP (o/w): 8.046 (est)
Soluble in:
 water, 0.005031 mg/L @ 25 °C (est)
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Organoleptic Properties:
Odor Strength: low
Odor Description:
at 100.00 %. 
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Cosmetic Information:
None found
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BOC Sciences
For experimental / research use only.
For experimental / research use only.
Octadecanal >95.0%(GC)
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Safety Information:
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined
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Safety in Use Information:
Category: cosmetic agents
Recommendation for stearyl aldehyde usage levels up to:
 not for fragrance use.
Recommendation for stearyl aldehyde flavor usage levels up to:
 not for flavor use.
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Safety References:
EPI System: View
Cancer Citations: Search
Toxicology Citations: Search
EPA ACToR: Toxicology Data
EPA Substance Registry Services (SRS): Registry
Laboratory Chemical Safety Summary : 12533
National Institute of Allergy and Infectious Diseases: Data
Chemidplus: 0000638664
RTECS: RG0181500 for cas# 638-66-4
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NIST Chemistry WebBook: Search Inchi
Pubchem (cid): 12533
Pubchem (sid): 134975840
Flavornet: 638-66-4
Pherobase: View
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Other Information:
(IUPAC): Atomic Weights of the Elements 2009
(IUPAC): Atomic Weights of the Elements 2009 (pdf)
Videos: The Periodic Table of Videos
tgsc: Atomic Weights use for this web site
(IUPAC): Periodic Table of the Elements
KEGG (GenomeNet): C01838
HMDB (The Human Metabolome Database): HMDB02384
FooDB: FDB022988
Export Tariff Code: 2912.19.5000
Typical G.C.
VCF-Online: VCF Volatile Compounds in Food
ChemSpider: View
Wikipedia: View
RSC Learn Chemistry: View
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Potential Blenders and core components note
None Found
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Potential Uses:
 orris iris 
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Occurrence (nature, food, other): note
 cinnamomum micranthum haysta
Search Trop  Picture
 ferula cupularis leaf oil @ 1.65%
Data  GC  Search Trop  Picture
 fleabane oil @ 0.20%
Data  GC  Search Trop  Picture
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 lime oil expressed florida @ trace%
Data  GC  Search Trop  Picture
 orris root
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 octadecane aldehyde
 octadecyl aldehyde
 oleic aldehyde
 stearic aldehyde
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