Category: 763-69-9

Polyimide Polymer Glass-Free Capillary Columns for Gas Chromatography was written by Webster, Jackie G.;Marine, Susan S.;Danielson, Neil D.. And the article was included in Journal of Chromatographic Science in 2011.Safety of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Polymeric polyimide capillary tubing, both uncoated and coated with stationary phases of two polarities, is explored for use as capillary columns for gas chromatog. (GC). These glass-free polyimide columns are flexible and their small winding diameter of less than a cm around a solid support makes them compatible for potential use in portable GC instruments. Polyimide columns with dimensions of 0.32 mm internal diameter × 3 m are cleaned, annealed at 300°, and coated using the static method with phenylmethylsilicone (PMS). Separations of volatile organics were studied isothermally on duplicate sets of polyimide columns by GC with a flame ionization detector using split injection. Unlike the uncoated ones, the coated polyimide columns successfully sep. Grob test mix classes of alkanes, amines, and fatty acid Me esters. The relative standard deviations for retention time and peak area are 0.5 and 2.5 , resp. With the 3 m PMS-coated column connected to a retention gap to permit operation at its optimum flow rate of 30 cm/s, a plate count of 3200 or plate height of 1 mm is possible. Lack of retention and tailing peaks are evident for the polyimide polymer capillary columns as compared to that of a 3 m com. cross-linked PMS fused silica capillary. However, headspace analyses of an aromatic hydrocarbon mix and a Clearcoat automotive paint sample are viable applications on the PMS polyimide polymer column. (c) 2011 Preston Publications. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Safety of Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Safety of Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Studies of the uptake of gaseous ethyl-3-ethoxy propionate onto ammonium sulfate and ammonium nitrate aerosol particles was written by Stewart, K. D.;Andino, J. M.. And the article was included in WIT Transactions on Ecology and the Environment in 2005.Related Products of 763-69-9 The following contents are mentioned in the article:

Understanding the heterogeneous (gas-particle) interactions that occur in the troposphere is of seminal importance for modelers that assess the atm. fates and transport of gases. One means of understanding these interactions is to calculate the mass uptake coefficient of a gaseous species onto common anthropogenic aerosols via an exptl. means. The effective uptake behavior of gaseous Et -3-Ethoxy Propionate (E3EP) onto ammonium sulfate and ammonium nitrate aerosols of varying total surface areas was studied using a custom manufactured flow system. E3EP is an organic species that is commonly found in paint and paint products. Ammonium sulfate and ammonium nitrate aerosols were studied because of their abundance in the troposphere. Gas phase E3EP concentrations were obtained using a solid phase microextraction technique (SPME) coupled to a gas chromatograph with a flame ionization detector (GC-FID). Analyses of the ammonium sulfate and ammonium nitrate aerosols were carried out using a Scanning Mobility Particle Sizing system (SMPS). As expected, losses of gaseous E3EP onto the aerosol surfaces decreased with decreasing initial surface area. The calculated initial effective uptake coefficients were shown to vary, depending on aerosol composition Due to the lack of published literature data regarding the heterogeneous interactions of organic species in the troposphere, these studies provide a significant enhancement to the overall knowledge base. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Related Products of 763-69-9).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Related Products of 763-69-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Comparison of Liquid-Liquid Extraction, Simultaneous Distillation Extraction, Ultrasound-Assisted Solvent Extraction, and Headspace Solid-Phase Microextraction for the Determination of Volatile Compounds in Jujube Extract by Gas Chromatography/Mass Spectrometry was written by Wang, Hui;Li, Peng;Sun, Shi-Hao;Zhang, Qi-Dong;Su, Yue;Zong, Yong-Li;Xie, Jian-Ping. And the article was included in Analytical Letters in 2014.Related Products of 763-69-9 The following contents are mentioned in the article:

Jujube extract has a unique flavor that has been used as a common fragrance due to the volatile compounds In this study, the volatiles of jujube extract were isolated by liquid-liquid extraction, simultaneous distillation extraction, ultrasound-assisted solvent extraction, and headspace solid-phase microextraction, and analyzed by gas chromatog.-mass spectrometry. Altogether 92 compounds were identified by the four methods, of which 53 components were identified for the first time; however, only 21 compounds were identified by all these methods. The performance characteristics of the four pretreatment techniques were compared by principal component anal. which showed that the volatile compounds obtained by liquid-liquid extraction and ultrasound-assisted solvent extraction were similar both in categories and in content; whereas, the volatiles extracted by simultaneous distillation extraction, ultrasound-assisted solvent extraction, and headspace solid-phase microextraction greatly varied. The results indicated that a multi-pretreatment technique should be adopted in order to obtain the most complete information about the volatile compounds in jujube extract The ultrasound-assisted solvent extraction method exhibited excellent repeatability and recoveries, and was very suitable for quant. anal. Although the recoveries and reproducibility of headspace solid-phase microextraction were inferior to the other methods, it was more sensitive than other methods. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Related Products of 763-69-9).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Related Products of 763-69-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rapid Simultaneous Determination of Volatile Organic Compounds in Mattress Fabric by Headspace-Gas Chromatography-Mass Spectrometry was written by Wen, Yao;Cao, Shurui;Xi, Cunxian;Li, Xianliang;Zhang, Lei;Wang, Guomin;Shang, Jingchuan. And the article was included in Analytical Letters in 2018.Electric Literature of C7H14O3 The following contents are mentioned in the article:

An anal. method for simultaneously determining 32 volatile organic compounds in mattress fabrics based on static headspace coupled to gas chromatog. and mass spectrometry detection was established. Samples were cut into 5 脳 5 mm small pieces and placed in a 20 mL headspace vial at 90掳 for 30 min. To achieve the optimum conditions for the anal., several parameters including the heating temperature, heating time, sample weight, and injection time were investigated. The results demonstrated that the most important parameter influencing the sensitivity of the anal. was the heating temperature The optimum method showed good linearities with correlation coefficients ranged from 0.9944 to 0.9998. The limits of detection and quantification for the target compounds were in the ranges of 0.004-0.032 and 0.013-0.099 渭g/ g, resp. The method was successfully applied to determine the volatile organic compounds in six categories of mattress fabrics. The results showed that some volatile organic compounds were found, such as naphthalene, hexadecane, and 1,4-diisopropylbenzene. Moreover, the concentrations of 32 volatile organic compounds decreased following the order of jute, terylene, polyester, velboa, nylon, and cotton samples in the study. These results indicated that the method is fast, accurate, and successful for determining volatile organic compounds in mattress fabrics. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Electric Literature of C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Electric Literature of C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Differentiation of fresh and processed fruit juices using volatile composition was written by Perestrelo, Rosa;Silva, Catarina;Silva, Pedro;Medina, Sonia;Camara, Jose S.. And the article was included in Molecules in 2019.Reference of 763-69-9 The following contents are mentioned in the article:

In the current study, a comprehensive approach based on headspace solid-phase microextraction (HS-SPME), combined with gas chromatog.-quadrupole mass spectrometry (GC-qMS), was used to establish the volatile signature of fresh and processed fruit juices, obtained from the same batch of grapes, red fruits, orange, pear, and apple. This is a powerful tool for evaluating the impact of the production process on the volat. pattern of fruit juice. A total of 169 volatile organic compounds (VOCs) belonging to different chem. groups were identified. Esters, carbonyl compounds, terpenoids, and alcs. are the major chem. groups in the investigated fruit juices. However, their contribution to the total volatile profile varied. Special attention should be paid to processed fruit juices to avoid the possible deleterious effects associated with the formation of furanic compounds (e.g., heat treatment), since their furanic content was significantly higher in comparison to that of fresh fruit juices. The knowledge obtained in the current study will allow for the introduction of modifications to the process involved in processing juice, which will improve the organoleptic characteristics of processed juices, contributing to a better acceptance by consumers. Furthermore, more assays should be performed to assess the effect of harvests, geog., and agronomy on the volatile profile of juices. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Reference of 763-69-9).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Reference of 763-69-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Emission characteristics and ozone formation potentials of VOCs from ultra-low-emission waterborne automotive painting was written by Ou, Runhua;Chang, Chun;Zeng, Yicong;Zhang, Xiong;Fu, Mingli;Fan, Liya;Chen, Peirong;Ye, Daiqi. And the article was included in Chemosphere in 2022.Application In Synthesis of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Automotive painting plants are important emission sources of volatile organic compounds (VOCs) that contribute significantly to ground-level ozone (O₃) pollution in atm. Here, we investigated process-specified emission characteristics of VOCs, without or with advanced adsorption/incineration after-treatments, from an ultra-low-emission (ULE) waterborne painting process in a modernized automotive plant. Overall, more than 80 VOCs species were identified and sorted into seven main categories. In the stack emissions without after-treatments, oxygenated VOCs (alcs., esters, ketones, ethers, etc.) were found to be the most abundant components (48.8%), followed by aromatic (30.9%), alkanes (16.9%) and alkenes (1.2%). Among the different VOCs species discharged to atm. (i.e. after adsorption/incineration after-treatments), aromatics demonstrated a predominant contribution (by 60.6%) to the total O₃ formation potentials (OFPs) despite their relatively lower abundance. Trimethylbenzene was identified to have the highest OFPs, and thus should be controlled with peculiar priority. As compared to traditional organic solvent-based painting process, the ULE waterborne process implemented in the target plant allows to reduce the OFPs from 10.7 mg m^-3 to 3 mg m^-3 (or by 72%). Addnl. monitoring by unmanned aerial vehicle (over more than 3000 sampling points in the plant) confirmed that the instantaneous concentrations of fugitive VOCs were well below the regulated limit value during typical working and non-working days. These findings may provide important reference for reduction of VOCs emissions and O₃ pollution from automotive painting processes. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Application In Synthesis of Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Application In Synthesis of Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Analysis and assessment of Madeira wine ageing over an extended time period through GC-MS and chemometric analysis was written by Pereira, Ana C.;Reis, Marco S.;Saraiva, Pedro M.;Marques, Jose C.. And the article was included in Analytica Chimica Acta in 2010.COA of Formula: C7H14O3 The following contents are mentioned in the article:

Wine is one of the world’s higher value agricultural products. The present work is centered on Madeira wine, a fine and prestigious example among Portuguese liqueur wines, with the main goal to deepen our understanding of relevant phenomena going on during the winemaking process, in particular during aging of “Malmsey” Madeira wine. In this paper we present the results obtained from the chem. characterization of how its aroma composition evolves during aging, and the development of a robust framework for analyzing the identity of aged Madeira wines. An extended aging period was considered, covering a time frame of twenty years, from which several samples were analyzed in terms of their aromatic composition The multivariate structure of this chem. information was then processed through multivariate statistical feature extraction techniques such as principal component anal. (PCA) and partial least squares discriminant anal. (PLS-DA), in order to identify the relevant patterns corresponding to trends associated with wine aging. Classification methodologies for age prediction were developed, using data from the lower dimensional sub-spaces obtained after projecting the original data to the latent variable spaces provided by PCA or PLS-DA. Finally, the performance for each classification methodol. developed was evaluated according to their error rates using cross-validation methodologies (Leave-One-Out and k-fold Monte Carlo). Results obtained so far show that quite interesting classification performances can indeed be achieved, despite the natural variability present in wine products. These results also provide solid bases which can be used to build up available frameworks which assist quality monitoring and identity assurance tasks. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9COA of Formula: C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. COA of Formula: C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Air formaldehyde and solvent concentrations during surface coating with acid-curing lacquers and paints in the woodworking and furniture industry was written by Thorud, Syvert;Gjolstad, Merete;Ellingsen, Dag G.;Molander, Paal. And the article was included in Journal of Environmental Monitoring in 2005.Electric Literature of C7H14O3 The following contents are mentioned in the article:

An investigation of contemporary exposure to formaldehyde and organic solvents was carried out during surface coating with acid-curing lacquers and paints in the Norwegian woodworking and furniture industry over a period of 3 years. The investigation covered 27 factories of different sizes and with different types of production, and totally 557 parallel formaldehyde and solvent samples were collected. The formaldehyde concentration (geometric mean) was 0.15 ppm (range 0.01-1.48 ppm) with about 10% of the samples exceeding the Norwegian occupational exposure limit of 0.5 ppm. The solvent concentration as additive effect (geometric mean) was 0.13 (range 0.0004-5.08) and about 5% of the samples exceeded the Norwegian occupational exposure limit. The most frequently occurring solvents from acid-curing lacquers were Bu acetate, ethanol, Et acetate, and 1-butanol, which were found in 88-98% of the samples. Toluene, Bu acetate, and 1-butanol were the only solvents with maximum concentrations exceeding their resp. occupational exposure limits. Curtain painting machine operators were exposed to the highest concentrations of both formaldehyde (geometric mean 0.51 ppm, range 0.08-1.48 ppm) and organic solvents (additive effect, geometric mean 1.18, range 0.02-5.08). Other painting application work tasks such as automatic and manual spray-painting, manual painting, and dip painting, showed on average considerably lower concentrations of both formaldehyde (geometric means 0.07-0.16 ppm) and organic solvents (additive effect, geometric mean 0.02-0.18). Non-painting work tasks also displayed moderate concentrations of formaldehyde (geometric means 0.11-0.17 ppm) and organic solvents (additive effect, geometric mean 0.04-0.07). This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Electric Literature of C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Electric Literature of C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Comparison of sampling efficiency and storage stability on different sorbents for determination of solvents in occupational air was written by Gjolstad, Merete;Bergemalm-Rynell, Kerstin;Ljungkvist, Goeran;Thorud, Syvert;Molander, Paal. And the article was included in Journal of Separation Science in 2004.Application In Synthesis of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

This study describes the sampling efficiency and storage stability of compounds typically present in occupational atms. on the sorbents Anasorb CSC, Anasorb 747, and Chromosorb 106. The selection of compounds included in the study contained aliphatic and aromatic hydrocarbons, alcs., esters, glycol ethers, ketones, and halogenated compounds, thus representing a wide range of chem. and phys. properties. The different sorbent tubes were simultaneously exposed to the selected compounds as three different mixtures of solvent vapors in air, and storage both at room temperature and at -22掳 was studied. The sorbent tubes were stored and analyzed at two different laboratories The sampling efficiencies of all the studied compounds were excellent on Anasorb CSC and Anasorb 747, while Chromosorb 106 did not give such good results for the most volatile compounds under study. The room temperature storage stability on Chromosorb 106, however, was good for all compounds, although formation of artifacts was observed during storage, a disadvantage that was substantially reduced by storage at -22掳. The room temperature storage stability on Anasorb CSC was good for all compounds except some of the ketones. The room temperature storage stability of these ketones, especially cyclohexanone and 2-butanone, was much better on Anasorb 747, which still showed the same excellent storage stability for the remaining compounds When stored in a freezer, the storage stability of all compounds, including the ketones, was very good on all sorbents. Among the sorbents under study, Anasorb 747 appears to be the most suitable allround sorbent for monitoring volatile compounds in occupational air, with satisfactory capabilities regarding both sampling efficiency and storage stability. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Application In Synthesis of Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Application In Synthesis of Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Volatile organic compound emissions from surface coating facilities: characterization of facilities, estimation of emission rates, and dispersion modeling of off-site impacts was written by Athappan, Annabrabha;Sumitsawan, Sulak;Gangupomu, Roja Haritha;Kositkanawuth, Ketwalee;Parikh, Parthen;Afotey, Benjamin;Sule, Neelesh;Kalidindi, Sahithi Raj;Sattler, Melanie L.;Weatherton, Yvette Pearson. And the article was included in Journal of Environmental Protection in 2013.Computed Properties of C7H14O3 The following contents are mentioned in the article:

Surface coating facilities are major sources of volatile organic compounds (VOCs) in urban areas. These VOCs can contribute to ground-level ozone formation, and many are hazardous air pollutants (HAPs), including xylene, ethylbenzene, and toluene. This project was conducted in order to provide information for updating the Texas Commission on Environmental Quality TCEQ, USA, permit by rule for Surface Coating Facilities. Project objectives were: (1) to develop a database of information regarding surface coating facilities in Texas; (2) to estimate maximum emission rates for various VOC species from surface coating facilities in Texas; (3) to conduct dispersion modeling to estimate off-site impacts from surface coating facilities. The database was developed using 286 TCEQ permit files authorizing surface coating facilities in Texas during 2006 and 2007. The database was designed to include information important for estimating emission rates, and for using as inputs to the dispersion model. Hourly and annual emissions of volatile organic compounds VOCs, particulate matter PM, and exempt solvents ES were calculated for each permitted entity/ company in the database, according to equations given by TCEQ. Dispersion modeling was then conducted for 3 facility configurations worst-case stack height, good practice stack height, and fugitive emissions, for urban and rural dis- persion parameters, for 8-h and 24-h operating scenarios, and for 1-h, 24-h, and annual averaging times, for a total of 36 scenarios. The highest modeled concentrations were for the worst-case stack height, rural dispersion parameters, 24-h operation scenario, and 1-h averaging time. 108 specific chem. species, which are components of surface coatings, were identified as candidates for further health impacts review. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Computed Properties of C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Computed Properties of C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics