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Cas Database

Name	2-Methylundecanal	EINECS	203-765-0
CAS No.	110-41-8	Density	0.83 g/mL at 25 °C(lit.)
PSA	17.07000	LogP	3.96210
Solubility	1.3mg/L at 20℃	Melting Point	N/A
Formula	C12H24 O	Boiling Point	171 °C(lit.)
Molecular Weight	184.322	Flash Point	200 °F
Transport Information	N/A	Appearance	slightly yellow
Safety	Low toxicity by ingestion and skin contact. When heated to decomposition it emits acrid smoke and irritating fumes.	Risk Codes	N/A
Molecular Structure		Hazard Symbols	N/A
Synonyms	2-Methyl-1-undecanal;2-Methylundecanal; Aldehyde M.N.A.; Methyl n-nonyl acetaldehyde;Methylnonylacetaldehyde; NSC 46127	Article Data	31

2-Methylundecanal Synthetic route

: 68141-17-3
2-methylundecanal dimethyl acetal

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
Stage #1: 2-methylundecanal dimethyl acetal With 2,4,6-trimethyl-pyridine; triethylsilyl trifluoromethyl sulfonate In dichloromethane at 0℃; Stage #2: With water In dichloromethane	100%

: 54125-40-5
2-methyl-1,2-epoxyundecane

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
With methylaluminium bis(4-bromo-2,6-di-tert.-butylphenoxide) In dichloromethane at -78℃; for 0.5h;	96%
With methylaluminium bis(4-bromo-2,6-di-tert.-butylphenoxide) In dichloromethane at -78℃; Yield given;

: C13H24O3

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
With toluene-4-sulfonic acid In N,N-dimethyl-formamide at 80℃; for 4h; Temperature;	93%

: 103639-22-1
1-bromo-2-methyl-undecane

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
With dimethyl sulfoxide for 0.0569444h; Kornblum oxidation; Microwave irradiation;	92%

: 10522-26-6
2-methyl-1-undecanol

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
With pyridinium chlorochromate In dichloromethane for 3h; Ambient temperature;	86%

: 103680-89-3
2-hydroxymethyl-1-undecen

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
With chloro(cyclopentadienyl)bis(triphenylphosphinyl) ruthenium(II); triethylammonium hexafluorophosphate In 1,4-dioxane for 3.5h; Heating;	68%
With chloro(cyclopentadienyl)bis(triphenylphosphinyl) ruthenium(II); triethylammonium hexafluorophosphate In 1,4-dioxane at 100℃; for 3.5h;	68%

: 64-18-6
formic acid

: 861567-75-1
1-ethoxy-2-methyl-undecan-2-ol

: 110-41-8
2-methylundecanal

: 83803-54-7
2,3-epoxy-3-methyl-dodecanoic acid ethyl ester

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
Verseifung und Erhitzen;

: 861567-75-1
1-ethoxy-2-methyl-undecan-2-ol

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
With formic acid

: 124-11-8
non-1-ene

: 123-38-6
propionaldehyde

: 110-41-8
2-methylundecanal

Conditions

Conditions	Yield
With manganese triacetate In acetic acid
With copper diacetate; air; cobalt(II) acetate In acetic acid at 50℃; for 5h;	51 % Turnov.

2-Methylundecanal Chemical Properties

IUPAC Name: (2S)-2-Methylundecanal
Molecular Formula: C₁₂H₂₄O
Molecular Weight: 184.36
EINECS: 203-765-0
Density: 0.764 g/cm³
Boiling Point: 192.7 °C at 760 mmHg
Flash Point: 47.1 °C
Freely Rotating Bonds: 3
Polar Surface Area: 0 Å²
Index of Refraction: 1.435
Molar Refractivity: 57.47 cm³
Molar Volume: 220.1 cm³
Polarizability: 22.78 ×10^-24 cm³
Surface Tension: 23.2 dyne/cm
Enthalpy of Vaporization: 41.13 kJ/mol
Vapour Pressure: 0.672 mmHg at 25°C
Appearance: slightly yellow
The Cas Register Number of 2-Methylundecanal is 110-41-8.The chemical synonyms of 2-Methylundecanal (CAS NO.110-41-8) are 2-Methyl-1-undecanal ; Undecanal, 2-methyl- ; 2-Methylhendecanal ; 2-Methylundecanal ; Methyl n-nonyl acetaldehyde ; Methyl n-nonyl acetic aldehyde ; Methyl nonyl acetaldehyde ; Methyl nonyl acetic aldehyde ; Methyl-n-nonylacetaldehyde ; Methylnonylacetaldehyde ; Methylnonylacetic aldehyde .Product categories of 2-Methylundecanal (CAS NO.110-41-8) are Industrial/Fine Chemicals ; Aldehydes ; C₁₀ to C₂₁ ; Carbonyl Compounds ; Alphabetical Listings ; Flavors and Fragrances ; M-N .The molecular structure of 2-Methylundecanal (CAS NO.110-41-8) is.

2-Methylundecanal Uses

It is used as a fragrance component in soaps, detergents, and perfumes.

2-Methylundecanal Production

Georges Darzens recorded the synthesis of 2-methylundecanal in 1904 from methyl nonyl ketone and ethyl chloroacetate.
CH₃(CH₂)₈C(O)CH₃ + ClCH₂CO₂CH₃ → CH₃(CH₂)₈CH(CH₃)OCH(CO₂R) + HCl
CH₃(CH₂)₈CCH₃OCCO₂CH₃ + H₂O → CH₃(CH₂)₈CH(CH₃)CHO + CO₂ + ROH

2-Methylundecanal Toxicity Data With Reference

1.	eye-rbt 500 mg	UCDS** Union Carbide Data Sheet. (Industrial Medicine and Toxicology Dept., Union Carbide Corp., 270 Park Ave., New York, NY 10017) 12/13 ,1963.
2.	orl-rat LD50:6690 mg/kg	UCDS** Union Carbide Data Sheet. (Industrial Medicine and Toxicology Dept., Union Carbide Corp., 270 Park Ave., New York, NY 10017) 12/13 ,1963.
3.	skn-rbt LD50:14 g/kg	UCDS** Union Carbide Data Sheet. (Industrial Medicine and Toxicology Dept., Union Carbide Corp., 270 Park Ave., New York, NY 10017) 12/13 ,1963.

2-Methylundecanal Consensus Reports

Reported in EPA TSCA Inventory.

2-Methylundecanal Safety Profile

Mildly toxic by ingestion and skin contact. An eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.
WGK Germany: 1
RTECS: YQ1509000

2-Methylundecanal Specification

It smells herbaceous, orange, and ambergris-like. At high dilution it has a flavor similar to honey and nuts.

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