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112-05-0 Usage


Different sources of media describe the Description of 112-05-0 differently. You can refer to the following data:
1. Nonanoic acid (also known as pelargonic acid; chemical formula: CH3 (CH2)7COOH) is a kind of organic carboxylic acid compound. It is naturally existed in the oil of pelargonium in the form of esters. It is commonly used in conjunction with glyphosate which is a kind of non-selective herbicide in order to obtain a quick burn-down effect in the control of weeds in turfgrass. It is also a potent antifungal agent which can inhibit spore germination and mycelial growth of pathogenic fungi. Its synthetic esters, such as methyl nonanoate can be used as flavorings. Moreover, it can also be used in the preparation of plasticizers and lacquers. It can also be potentially used for the treatment of seizures.
2. Nonanoic acid , also called pelargonic acid, is an organic compound composed of a nine - carbon chain terminating in a carboxylic acid with structural formula CH3(CH2)7COOH. Nonanoic acid forms esters—nonanoates. It is a clear, oily liquid with an unpleasant, rancid odor. It is nearly insoluble in water, but very soluble in chloroform, ether, and hexane. Its refractive index is 1.4322. Its critical point is at 712 K ( 439 °C ) and 2.35 MPa.


https://en.wikipedia.org/wiki/Nonanoic_acid http://www.abcam.com/nonanoic-acid-pelargonic-acid-ab143891.html

Chemical Properties

Different sources of media describe the Chemical Properties of 112-05-0 differently. You can refer to the following data:
1. clear colorless liquid
2. Colorless or yellowish, combustible, oily liquid. Faint odor.
3. Nonanoic acid has a fatty, characteristic odor and a corresponding unpleasant taste. May be prepared by oxidation of methylnonyl ketone; by oxidation of oleic acid; or from heptyl iodide via malonic ester synthesis.
4. Nonanoic acid has a fatty, characteristic odor and a corresponding unpleasant taste. This compound is also reported as having a cheese, waxy flavor


Pellar,Crookes Barnes, US ,1960


Nonanoic acid is a fatty acid which occurs naturally as esters in the oil of pelargonium. Synthetic esters, such as methyl nonanoate, are used as flavorings. Nonanoic acid is also used in the preparation of plasticizers and lacquers. The derivative 4-nonanoylmorpholine is an ingredient in some pepper sprays. The ammonium salt of nonanoic acid, ammonium nonanoate, is used as an herbicide.


Different sources of media describe the Uses of 112-05-0 differently. You can refer to the following data:
1. The primary uses of this acid are in organic synthesis and in the manufacture of lacquers, plastics, pharmaceuticals, synthetic odors and flavorings, gasoline additives, flotation agents, lubricants, and vinyl plasticizers. Nonanoic acid has found some use in pharmaceutical preparations and as a topical bactericide and fungicide. It is also used in herbicides.
2. Intermediates of Liquid Crystals
3. In the production of hydrotropic salts (hydrotropic salts form aqueous solutions which dissolve sparingly soluble substances to a greater extent than water); in the manufacture of lacquers, plastics.


ChEBI: A C9 straight-chain saturated fatty acid which occurs naturally as esters of the oil of pelargonium. Has antifungal properties, and is also used as a herbicide as well as in the preparation of plasticisers and lacquers.

Manufacturing Process

A body of liquid, 18 inches high, comprising a 35% (by weight) solution of technical (95%) oleic acid in n-propanol, is maintained at a temperature of 86°C in a reactor. The solution also contains dissolved therein 0.042% by weight of cobalt, in the form of cobalt naphthenate. From the bottom of the reactor very fine bubbles of air are passed into and through the solution at the rate of about 0.3 cubic feet per minute, measured at standard conditions, per square foot for 72 hours. The gases leaving the reactor are first passed through an ice water reflux condenser and then vented to the atmosphere. At the end of the 72 hour period the reaction mixture is separated into its components. It is found that 60% of the oleic acid has been consumed in the reaction. For each pound of oleic acid consumed there are obtained 0.30 pound of azelaic acid (representing an efficiency of 46%, calculated on the basis that the technical oleic acid is 100% oleic acid), 0.13 pound of pelargonic acid (representing an efficiency of 23%) and 0.21 pound of 9,10dihydroxystearic acid (representing an efficiency of 19%).

Therapeutic Function


Aroma threshold values

Detection: 3 to 9 ppm

Taste threshold values

Taste characteristics at 10 ppm: fatty, waxy, and cheesy with a mild, sweet, creamy background

Synthesis Reference(s)

Journal of the American Chemical Society, 93, p. 195, 1971 DOI: 10.1021/ja00730a033Organic Syntheses, Coll. Vol. 2, p. 474, 1943Tetrahedron Letters, 9, p. 5689, 1968

General Description

Nonanoic acid occurs naturally in Pelargonium L′Her. It one of the flavor constituents of cooked rice, acerola fruit, licorice and yogurt.

Agricultural Uses

Herbicide, Fungicide: Pelargonic acid occurs naturally in many plants and animals. It is used to control the growth of weeds and as a blossom thinner for apple and pear trees. It is also used as a food additive; as an ingredient in solutions used to commercially peel fruits and vegetables

Trade name

CIRRASOL?-185A; ECONOSAN?; EMERY? 202 (mixture with n-octoic acid); EMFAC?-1202; HEXACID? C-9; PELARGON?; SCYTHE?; WEST AGRO ACID SANITIZER?

Safety Profile

Poison by intravenous route. Moderately toxic by ingestion. A severe skin and eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.


By oxidation of methylnonyl ketone; by oxidation of oleic acid; or from heptyl iodide via malonic ester synthesis

Potential Exposure

Pelargonic acid, a naturally occurring fatty acid herbicide/fungicide. It is used to control the growth of weeds and as a blossom thinner for apple and pear trees. It is also used as a food additive; as an ingredient in solutions used to commercially peel fruits and vegetables; in the manufacture of lacquers, plastics and pharmaceuticals.

Purification Methods

Esterify the acid with ethylene glycol and distil the ester. (This removes dibasic acids as undistillable residues.) The acid is regenerated by hydrolysing the ester in the usual way and is distilled in vacuo. [Beilstein 2 IV 1018.]


Heated vapors may form explosive mixture with air. May react violently with strong oxidizers, bromine, 90% hydrogen peroxide, phosphorus trichloride, silver powders or dust. Incompatible with strong bases and silver compounds; mixture with some silver compounds may form explosive salts of silver oxalate.

Waste Disposal

Do not discharge into drains or sewers. Dispose of waste material as hazardous waste using a licensed disposal contractor to an approved landfill. Contact a licensed disposal facility about surplus and non-recyclable solutions. Burn in a chemical incinerator equipped with an afterburner and scrubber. Extra care must be exercised as the material in an organic solvent is highly flammable. Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Incineration with effluent gas scrubbing is recommended. Containers must be disposed of properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.

Check Digit Verification of cas no

The CAS Registry Mumber 112-05-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,1 and 2 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 112-05:
20 % 10 = 0
So 112-05-0 is a valid CAS Registry Number.

112-05-0 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • Alfa Aesar

  • (B21568)  Nonanoic acid, 97%   

  • 112-05-0

  • 250ml

  • 248.0CNY

  • Detail
  • Alfa Aesar

  • (B21568)  Nonanoic acid, 97%   

  • 112-05-0

  • 1000ml

  • 381.0CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017


1.1 GHS Product identifier

Product name pelargonic acid

1.2 Other means of identification

Product number -
Other names nonanic acid

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Uncategorized
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:112-05-0 SDS

112-05-0Related news

Synthesis of titania microspheres with hierarchical structures and high photocatalytic activity by using Nonanoic acid (cas 112-05-0) as the structure-directing agent08/27/2019

The titania, as the heterogeneous photocatalyst, has attracted much attention in attempts to eliminate pollutants, especially organic compounds in water and air. In this study, the titania microspheres with hierarchical structures were prepared by a combined sol–gel and solvothermal method. The...detailed

Increasing the yield of MCL-PHA from Nonanoic acid (cas 112-05-0) by co-feeding glucose during the PHA accumulation stage in two-stage fed-batch fermentations of Pseudomonas putida KT244008/26/2019

A method was developed to increase the yield of MCL-PHA from nonanoic acid in the PHA accumulation phase. Pseudomonas putida KT2440 was grown on glucose until ammonium-limitation was imposed. In the second (accumulation) stage, either glucose, nonanoic acid, or a mixture of these carbon and ener...detailed

ORIGINAL ARTICLEInduction of Thymic Stromal Lymphopoietin Production by Nonanoic acid (cas 112-05-0) and Exacerbation of Allergic Inflammation in Mice08/24/2019

ABSTRACTBackgroundThymic stromal lymphopoietin (TSLP) plays critical roles in the induction and exacerbation of allergic diseases. We tested various chemicals in the environment and found that xylene and 1,2,4-trimethylbenzene induced the production of TSLP in vivo. These findings prompted us to...detailed

Caprylic acid and Nonanoic acid (cas 112-05-0) upregulate endogenous host defense peptides to enhance intestinal epithelial immunological barrier function via histone deacetylase inhibition08/22/2019

The intestinal epithelial barrier plays a critical role in the etiopathogenesis of ulcerative colitis. This study aims to explore the potential effects and underlying mechanisms of medium chain fatty acids (caprylic acid and nonanoic acid) on intestinal epithelial barrier function. Using the por...detailed

112-05-0Relevant articles and documents

Activation of Reducing Agents.Sodium Hydride Containing Complex Reducing Agents.16. FeCRACO, a new Reagent for Carbonylation of Primary, Secondary, and Tertiary Alkyl Halides at Atmospheric Pressure

Brunet, Jean-Jacques,Sidot, Christian,Caubere, Paul

, p. 3147 - 3149 (1981)



, p. 1413,1414 (1956)

Hydrocarboxylation of terminal alkenes in supercritical carbon dioxide using perfluorinated surfactants

Tortosa-Estorach, Clara,Ruiz, Nuria,Masdeu-Bulto, Anna M.

, p. 2789 - 2791 (2006)

High selectivity in acids is obtained in the first example of hydrocarboxylation of 1-octene in supercritical carbon dioxide using a Pd/P(4-C6H4-CF3)3 catalyst system and a perfluorinated surfactant. The Royal Society of Chemistry 2006.

Long-chain alkanoic acid esters of lupeol from Dorstenia harmsiana Engl. (Moraceae)

Poumale, Herve Martial P.,Awoussong, Kenzo Patrice,Randrianasolo, Rivoarison,Simo, Christophe Colombe F.,Ngadjui, Bonaventure Tchaleu,Shiono, Yoshihito

, p. 749 - 755 (2012)

In addition to lupeol (1a), three long-chain alkanoic acid esters of lupeol, in which two were new, were isolated from the hexane and ethyl acetate twigs extract of Dorstenia harmsiana Engl. (Moraceae). The structures of the new compounds were elucidated

Scalable, sustainable and catalyst-free continuous flow ozonolysis of fatty acids

Atapalkar, Ranjit S.,Athawale, Paresh R.,Srinivasa Reddy,Kulkarni, Amol A.

, p. 2391 - 2396 (2021)

A simple and efficient catalyst-free protocol for continuous flow synthesis of azelaic acid is developed from the renewable feedstock oleic acid. An ozone and oxygen mixture was used as the reagent for oxidative cleavage of double bond without using any metal catalyst or terminal oxidant. The target product was scaled up to more than 100 g with 86% yield in a white powder form. Complete recycling and reuse of the solvent were established making it a green method. The approach is significantly energy efficient and also has a very small chemical footprint. The methodology has been successfully tested with four fatty acids making it a versatile platform that gives value addition from renewable resources.

Reactive Species and Reaction Pathways for the Oxidative Cleavage of 4-Octene and Oleic Acid with H2O2over Tungsten Oxide Catalysts

Yun, Danim,Ayla, E. Zeynep,Bregante, Daniel T.,Flaherty, David W.

, p. 3137 - 3152 (2021)

Oxidative cleavage of carbon-carbon double bonds (C-C) in alkenes and fatty acids produces aldehydes and acids valued as chemical intermediates. Solid tungsten oxide catalysts are low cost, nontoxic, and selective for the oxidative cleavage of C-C bonds with hydrogen peroxide (H2O2) and are, therefore, a promising option for continuous processes. Despite the relevance of these materials, the elementary steps involved and their sensitivity to the form of W sites present on surfaces have not been described. Here, we combine in situ spectroscopy and rate measurements to identify significant steps in the reaction and the reactive species present on the catalysts and examine differences between the kinetics of this reaction on isolated W atoms grafted to alumina and on those exposed on crystalline WO3 nanoparticles. Raman spectroscopy shows that W-peroxo complexes (W-(η2-O2)) formed from H2O2 react with alkenes in a kinetically relevant step to produce epoxides, which undergo hydrolysis at protic surface sites. Subsequently, the CH3CN solvent deprotonates diols to form alpha-hydroxy ketones that react to form aldehydes and water following nucleophilic attack of H2O2. Turnover rates for oxidative cleavage, determined by in situ site titrations, on WOx-Al2O3 are 75% greater than those on WO3 at standard conditions. These differences reflect the activation enthalpies (ΔH?) for the oxidative cleavage of 4-octene that are much lower than those for the isolated WOx sites (36 ± 3 and 60 ± 6 kJ·mol-1 for WOx-Al2O3 and WO3, respectively) and correlate strongly with the difference between the enthalpies of adsorption for epoxyoctane (ΔHads,epox), which resembles the transition state for epoxidation. The WOx-Al2O3 catalysts mediate oxidative cleavage of oleic acid with H2O2 following a mechanism comparable to that for the oxidative cleavage of 4-octene. The WO3 materials, however, form only the epoxide and do not cleave the C-C bond or produce aldehydes and acids. These differences reflect the distinct site requirements for these reaction pathways and indicate that acid sites required for diol formation are strongly inhibited by oleic acids and epoxides on WO3 whereas the Al2O3 support provides sites competent for this reaction and increase the yield of the oxidative cleavage products.

Aliphatic organolithiums by fluorine-lithium exchange: n-octyllithium

Yus, Miguel,Herrera, Raquel P.,Guijarro, Albert

, p. 5025 - 5027 (2003)

The reaction of 1-fluorooctane (1) with an excess of lithium powder (4-10 equiv.) and DTBB (2-4 equiv.) in THP at 0°C for 5 min gives a solution of the corresponding 1-octyllithium (2), which reacts then with different electrophiles at 0°C (D2O, MeSiCl, ButCHO, Et2CO), or -78°C [ClCO2Me, (PhCH2S)2] or -40°C (CO2) to room temperature to give, after hydrolysis, the expected products (3). The same process applied to 2-fluorooctane gives mainly octane as reaction product, independently on the electrophile used, resulting from a proton abstraction by 2-lithiooctane formed from the reaction medium before addition of the electrophilic reagent.

Ozonolysis in flow using capillary reactors

Roydhouse, M. D.,Motherwell, W. B.,Ghaini, A.,Constantinou, A.,Cantu-Perez, A.,Gavriilidis, A.

, p. 989 - 996 (2011)

Reactions of n-decene with ozone and subsequent quenching of the formed ozonides were carried out under flow conditions using the standard Vapourtec flow system equipped with a cooled flow cell. The reactions were performed continuously and in the annular flow regime within the circular cross-section channels. Typical flow rates were 0.25-1 mL min-1 for liquid and 25-100 mL min-1 for gas, reactor volumes were 0.07-10 mL formed of 1 mm ID PFA tubing. The reaction temperature was -10 °C. The flow was not always smooth, while waves in the liquid film and droplets in the gas core were observed. Liquid residence times were found to be independent of gas flow rates and increasing with decreasing liquid flow rates. Substrate residence times in the ozonolysis reactor ranged between 1 and 80 s, and complete conversion could be achieved at ~1 s residence time. Two common reductants, triethylphosphite and triphenylphosphine, were examined as to their suitability under flow conditions. Triphenylphosphine achieved faster reduction of the intermediate ozonides, resulting in a greater than 10:1 selectivity for the aldehyde over the corresponding acid. The cooling system provided a safe and efficient control of the highly exothermic reaction system. The configuration of the system allowed the production of chemically significant amounts (1.8 g h-1 at 1.3 ozone equivalents), with minimal amounts of ozonides present at any time.

New environmentally friendly oxidative scission of oleic acid into azelaic acid and pelargonic acid

Godard, Anais,De Caro, Pascale,Thiebaud-Roux, Sophie,Vedrenne, Emeline,Mouloungui, Zephirin

, p. 133 - 140 (2013)

Oleic acid (OA) is a renewable monounsaturated fatty acid obtained from high oleic sunflower oil. This work was focused on the oxidative scission of OA, which yields a mono-acid (pelargonic acid, PA) and a di-acid (azelaic acid, AA) through an emulsifying system. The conventional method for producing AA and PA consists of the ozonolysis of oleic acid, a process which presents numerous drawbacks. Therefore, we proposed to study a new alternative process using a green oxidant and a solvent-free system. OA was oxidized in a batch reactor with a biphasic organic-aqueous system consisting of hydrogen peroxide (H 2O2, 30 %) as an oxidant and a peroxo-tungsten complex Q3{PO4[WO(O2)2]4} as a phase-transfer catalyst/co-oxidant. Several phase-transfer catalysts were prepared in situ from tungstophosphoric acid, H2O2 and different quaternary ammonium salts (Q+, Cl-). The catalyst [C5H5N(n-C16H33)] 3{PO4[WO(O2)2]4} was found to give the best results and was chosen for the optimization of the other parameters of the process. This optimization led to a complete conversion of OA into AA and PA with high yields (>80 %) using the system OA/H 2O2/[C5H5N(n-C16H 33)]3{PO4[WO(O2)2] 4} (1/5/0.02 molar ratio) at 85 C for 5 h. In addition, a new treatment was developed in order to recover the catalyst.

Engineering the nucleotide coenzyme specificity and sulfhydryl redox sensitivity of two stress-responsive aldehyde dehydrogenase isoenzymes of Arabidopsis thaliana

Stiti, Naim,Adewale, Isaac O.,Petersen, Jan,Bartels, Dorothea,Kirch, Hans-Hubert

, p. 459 - 471 (2011)

Lipid peroxidation is one of the consequences of environmental stress in plants and leads to the accumulation of highly toxic, reactive aldehydes. One of the processes to detoxify these aldehydes is their oxidation into carboxylic acids catalyzed by NAD(P)+-dependent ALDHs (aldehyde dehydrogenases). We investigated kinetic parameters of two Arabidopsis thaliana family 3 ALDHs, the cytosolic ALDH3H1 and the chloroplastic isoform ALDH3I1. Both enzymes had similar substrate specificity and oxidized saturated aliphatic aldehydes. Catalytic efficiencies improved with the increase of carbon chain length. Both enzymes were also able to oxidize α,β-unsaturated aldehydes, but not aromatic aldehydes. Activity of ALDH3H1 was NAD+-dependent, whereas ALDH3I1 was able to use NAD+ and NADP+. An unusual isoleucine residue within the coenzyme-binding cleft was responsible for the NAD +-dependence of ALDH3H1. Engineering the coenzyme-binding environment of ALDH3I1 elucidated the influence of the surrounding amino acids. Enzyme activities of both ALDHs were redox-sensitive. Inhibitionwas correlatedwith oxidation of both catalytic and noncatalytic cysteine residues in addition to homodimer formation. Dimerization and inactivation could be reversed by reducing agents. Mutant analysis showed that cysteine residues mediating homodimerization are located in the N-terminal region. Modelling of the protein structures revealed that the redox-sensitive cysteine residues are located at the surfaces of the subunits. The Authors Journal compilation

Carbon-Carbon Double Bond Cleavage Using Solid-Supported Potassium Permanganate on Silica Gel

Ferreira, J. Tercio B.,Cruz, W. O.,Vieira, P. C.,Yonashiro, M.

, p. 3698 - 3699 (1987)


Liquid-phase catalytic oxidation of unsaturated fatty acids


, p. 305 - 312 (1999)

Liquid-phase catalytic oxidation of oleic acid with hydrogen peroxide in the presence of various transition metal/metal oxide catalysts was studied in a batch autoclave reactor. Azelaic and pelargonic acids are the major reaction products. Tungsten and tantalum and their oxides in supported and unsupported forms were used as catalysts. Alumina pellets and Kieselguhr powder were used as supports for the catalysts. Tungsten, tantalum, molybdenum, zirconium, and niobium were also examined as catalysts. Tertiary butanol was used as solvent. Experimental results concluded that tungsten and tungstic oxide are more suitable catalysts in terms of their activity and selectivity. The rate of reaction observed in the case of supported catalysts appears to be comparable or superior to that of unsupported catalysts. In pure form, tungsten, tantalum, and molybdenum showed strong catalytic activity in the oxidation reaction; however, except for tantalum the other two were determined to be economically unfeasible. Zirconium and niobium showed very little catalytic activity. Based on the experimental observations, tungstic oxide supported on silica is the most suitable catalyst for the oxidation of oleic acid with 85% of the starting oleic acid converted to the oxidation products in 60 min of reaction with high selectivity for azelaic acid.

Product recovery from ionic liquids by solvent-resistant nanofiltration: Application to ozonation of acetals and methyl oleate

Van Doorslaer, Charlie,Glas, Daan,Peeters, Annelies,Cano Odena, Angels,Vankelecom, Ivo,Binnemans, Koen,Mertens, Pascal,De Vos, Dirk

, p. 1726 - 1733 (2010)

In this work we tackle the problematic separation of reaction products from ionic liquid media. Solvent-resistant nanofiltration proves to be an attractive technique for the separation of non-volatile polar products from ionic liquids. In view of the high compatibility between ozone and ionic liquids, two ozone-mediated model reactions were chosen: firstly the oxidation of acetals to esters in the presence of ozone and secondly the ozonation of methyl oleate to monomethyl azelate and pelargonic acid. The objective was to retain the ionic liquid phase by means of a solvent-resistant nanofiltration membrane, while the organic reaction products permeate through the polymeric membrane. First, the ozonations were studied in order to know the characteristic product compositions. Next, a screening of membranes was performed on synthetic product mixtures. The second generation polyimide-based DuraMem membranes showed the highest rejection, up to 96%, for the evaluated ionic liquids. These DuraMem membranes also proved suitable for the separation of the products on real reaction mixtures, even in a single filtration step.


Allen,J.C. et al.

, p. 1918 - 1932 (1965)


Novel regioselective hydrogenation of alkadienoic acids caused by the addition of water

Okano, Temon,Kaji, Mitsunari,Isotani, Satoru,Kiji, Jitsuo

, p. 5547 - 5550 (1992)

The regioselective hydrogenation of 3,8-nonadienoic acid to 8-nonenoic acid was realized by the addition of water with RhCl[P(p-tolyl)3]3 in benzene at 1 atm hydrogen, whereas in the absence of water the reaction mostly gave 3-nonenoic acid. The novel selectivity is caused by both an accelerating effect of water on the hydrogenation of the 3-position and a retarding effect on that of the 8-position.



, (1963)


Products and mechanisms of ozone reactions with oleic acid for aerosol particles having core-shell morphologies

Katrib, Yasmine,Martin, Scot T.,Hung, Hui-Ming,Rudich, Yinon,Zhang, Haizheng,Slowik, Jay G.,Davidovits, Paul,Jayne, John T.,Worsnop, Douglas R.

, p. 6686 - 6695 (2004)

Heterogeneous reactions of oleic acid aerosol particles with ozone are studied below 1% relative humidity. The particles have inert polystyrene latex cores (101-nm diameter) coated by oleic acid layers of 2 to 30 nm. The chemical content of the organic layer is monitored with increasing ozone exposure by using an aerosol mass spectrometer. The carbon-normalized percent yields of particle-phase reaction products are 20-35% 9-oxononanoic acid, 1-3% azelaic acid, 1-3% nonanoic acid, and 35-50% other organic molecules (designated as CHOT). There is approximately 25% evaporation, presumably as 1-nonanal. To explain the formation of CHOT molecules and the low yields of azelaic and nonanoic acids, we suggest a chemical mechanism in which the Criegee biradical precursors to azelaic acid and nonanoic acid are scavenged by oleic acid to form CHOT molecules. These chemical reactions increase the carbon-normalized oxygen content (z/x) of the CxH yOz layer from 0.1 for unreacted oleic acid to 0.25 after high ozone exposure. Under the assumption that oxygen content is a predictor of hygroscopicity, our results suggest an increased cloud condensation nuclei activity of atmospherically aged organic particles that initially have alkene functionalities.



Paragraph 0055-0083, (2021/07/27)

The present invention relates to a method for producing pelargonic acid and azelaic acid, and more specifically, provides a method for producing pelargonic acid and azelaic acid, which comprises the following steps of: a) reacting an unsaturated carboxylic acid compound under a tungstic acid catalyst to obtain an intermediate product comprising vicinal diol; and b) reacting the intermediate product under a transition metal hydroxide catalyst to obtain the pelargonic acid and azelaic acid. The production method is capable of producing the pelargonic acid and azelaic acid in a high yield from the unsaturated carboxylic acid compound.

A direct synthesis of carboxylic acidsviaplatinum-catalysed hydroxycarbonylation of olefins

Schneider, Carolin,Franke, Robert,Jackstell, Ralf,Beller, Matthias

, p. 2703 - 2707 (2021/05/05)

The platinum-catalysed hydroxycarbonylation of olefins is reported for the first time. Using a combination of PtCl2/2,2′-bis(tert-butyl(pyridin-2-yl)phosphanyl)-1,1′-binaphthalene (Neolephos) in the presence of sulfuric acid [0.6 M] in acetic acid selective carbonylation of terminal aliphatic olefins proceeds to good yields and selectivities to the corresponding carboxylic acids. Comparing the reactivity of different butenes (iso- andn-butenes), the terminal olefin can be selectively carbonylated.

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