Tag: 100-200

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

Mass Spectra of New Heterocycles: XXIII. Electron Impact and Chemical Ionization Study of 5-[(Cyanomethyl)sulfanyl]- and 5-[(1,3-Dioxolan-2-ylmethyl)sulfanyl]-1H-pyrrol-2-amines was written by Klyba, L. V.;Nedolya, N. A.;Sanzheeva, E. R.;Tarasova, O. A.. And the article was included in Russian Journal of Organic Chemistry in 2021.COA of Formula: C4H7NS The following contents are mentioned in the article:

The fragmentation of pyrroles I [R¹ = R² = Me, Et, n-Pr; R³ = Me, s-Bu, c-hexyl, etc.; -R¹R²– = -(CH₂)₄-, -(CH₂)₅-, -(CH₂)₂O(CH₂)₂; R⁴ = CN, 1,3-dioxolan-2-yl] under electron impact (70 eV) and chem. ionization with methane as reactant gas has been studied for the first time. Electron impact ionization of 5-[(cyanomethyl)sulfanyl]-substituted pyrroles generates low-stability mol. ions {M+., I_rel 4-22%; compared to I_rel 16-69% for 5-[(1,3-dioxolan-2-ylmethyl)sulfanyl] analogs} whose primary fragmentation involves cleavage of the C-S bond with expulsion of NCCH₂ radical. Other fragmentation pathways of the mol. ions include formation of [M – CHR⁴]^+. ions (R⁴ = CN) and substituent decomposition products. The mass spectra of 5-[(1,3-dioxolan-2-ylmethyl)sulfanyl]pyrroles characteristically show [M – SCH₂R⁴]⁺ ion peak. The most intense ion peaks in the chem. ionization mass spectra of 5-[(cyanomethyl)sulfanyl] derivatives are those of M^+. (I_rel 18-69%) and [M + H]⁺ (I_rel 34-100%). Both 5-[(cyanomethyl)sulfanyl]- and 5-[(1,3-dioxolan-2-ylmethyl)sulfanyl]pyrroles decompose mainly through cleavage of the CH₂-S and C⁵-S bonds with the formation of stable [M – CH₂R⁴]⁺ (I_rel 92-100%), [M + H – CH₂R⁴]^+. (I_rel 22-75%), and [M + H – SCH₂R⁴]^+. ions (I_rel 6-25%). This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8COA of Formula: C4H7NS).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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.COA of Formula: C4H7NS

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

Mass Spectra of New Heterocycles: XXIII. Electron Impact and Chemical Ionization Study of 5-[(Cyanomethyl)sulfanyl]- and 5-[(1,3-Dioxolan-2-ylmethyl)sulfanyl]-1H-pyrrol-2-amines was written by Klyba, L. V.;Nedolya, N. A.;Sanzheeva, E. R.;Tarasova, O. A.. And the article was included in Russian Journal of Organic Chemistry in 2021.Formula: C4H7NS The following contents are mentioned in the article:

The fragmentation of pyrroles I [R¹ = R² = Me, Et, n-Pr; R³ = Me, s-Bu, c-hexyl, etc.; -R¹R²– = -(CH₂)₄-, -(CH₂)₅-, -(CH₂)₂O(CH₂)₂; R⁴ = CN, 1,3-dioxolan-2-yl] under electron impact (70 eV) and chem. ionization with methane as reactant gas has been studied for the first time. Electron impact ionization of 5-[(cyanomethyl)sulfanyl]-substituted pyrroles generates low-stability mol. ions {M+., I_rel 4-22%; compared to I_rel 16-69% for 5-[(1,3-dioxolan-2-ylmethyl)sulfanyl] analogs} whose primary fragmentation involves cleavage of the C-S bond with expulsion of NCCH₂ radical. Other fragmentation pathways of the mol. ions include formation of [M – CHR⁴]^+. ions (R⁴ = CN) and substituent decomposition products. The mass spectra of 5-[(1,3-dioxolan-2-ylmethyl)sulfanyl]pyrroles characteristically show [M – SCH₂R⁴]⁺ ion peak. The most intense ion peaks in the chem. ionization mass spectra of 5-[(cyanomethyl)sulfanyl] derivatives are those of M^+. (I_rel 18-69%) and [M + H]⁺ (I_rel 34-100%). Both 5-[(cyanomethyl)sulfanyl]- and 5-[(1,3-dioxolan-2-ylmethyl)sulfanyl]pyrroles decompose mainly through cleavage of the CH₂-S and C⁵-S bonds with the formation of stable [M – CH₂R⁴]⁺ (I_rel 92-100%), [M + H – CH₂R⁴]^+. (I_rel 22-75%), and [M + H – SCH₂R⁴]^+. ions (I_rel 6-25%). This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Formula: C4H7NS).

Isopropylisothiocyanate (cas: 2253-73-8) 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. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Formula: C4H7NS

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

Floral scent and pollinators of Cypripedium calceolus L. at different latitudes was written by Braunschmid, Herbert;Guilhot, Robin;Dotterl, Stefan. And the article was included in Diversity in 2021.Synthetic Route of C10H20O2 The following contents are mentioned in the article:

Floral scent is an important trait in plant-pollinator interactions. It not only varies among plant species but also among populations within species. Such variability might be caused by various non-selective factors, or, as has been shown in some instances, might be the result of divergent selective pressures exerted by variable pollinator climates. Cypripedium calceolus is a Eurasian deceptive orchid pollinated mainly by bees, which spans wide altitudinal and latitudinal gradients in mainly quite isolated populations. In the present study, we investigated whether pollinators and floral scents vary among different latitudes. Floral scents of three C. calceolus populations in the Southern Alps were collected by dynamic headspace and analyzed by gas chromatog. coupled to mass spectrometry (GC/MS). These data were completed by previously published scent data of the Northern Alps and Scandinavia. The scent characteristics were compared with information on pollinators recorded for present study or available in the literature. More than 80 scent compounds were overall recorded from plants of the three regions, mainly aliphatics, terpenoids, and aromatics Seven compounds were found in all samples, and most samples were dominated by linalool and octyl acetate. Although scents differed among regions and populations, the main compounds were similar among regions. Andrena and Lasioglossum species were the main pollinators in all three regions, with Andrena being relatively more abundant than Lasioglossum in Scandinavia. We discuss natural selection mediated by pollinators and neg. frequency-dependent selection as possible reasons for the identified variation of floral scent within and among populations and regions. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Synthetic Route of C10H20O2).

Octyl acetate (cas: 112-14-1) 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 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.Synthetic Route of C10H20O2

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

Qualitative analysis of e-liquid emissions as a function of flavor additives using two aerosol capture methods was written by Eddingsaas, Nathan;Pagano, Todd;Cummings, Cody;Rahman, Irfan;Robinson, Risa;Hensel, Edward. And the article was included in International Journal of Environmental Research and Public Health in 2018.Synthetic Route of C8H16O2 The following contents are mentioned in the article:

This work investigates emissions sampling methods employed for qual. identification of compounds in e-liquids and their resultant aerosols to assess what capture methods may be sufficient to identify harmful and potentially harmful constituents present. Three popular e-liquid flavors (cinnamon, mango, vanilla) were analyzed using qual. gas chromatog.-mass spectrometry (GC-MS) in the un-puffed state. Each liquid was also machine-puffed under realistic-use flow rate conditions and emissions were captured using two techniques: filter pads and methanol impingers. GC-MS anal. was conducted on the emissions captured using both techniques from all three e-liquids The e-liquid GC-MS anal. resulted in pos. identification of 13 compounds from the cinnamon flavor e-liquid, 31 from mango, and 19 from vanilla, including a number of compounds observed in all e-liquid experiments Nineteen compounds were observed in emissions which were not present in the un-puffed e-liquid Qual. GC-MS anal. of the emissions samples identify compounds observed in all three samples: e-liquid, impinge, and filter pads, and each subset thereof. A limited number of compounds were observed in emissions captured with impingers, but were not observed in emissions captured using filter pads; a larger number of compounds were observed on emissions collected from the filter pads, but not those captured with impingers. It is demonstrated that sampling methods have different sampling efficiencies and some compounds might be missed using only one method. It is recommended to investigate filter pads, impingers, thermal desorption tubes, and solvent extraction resins to establish robust sampling methods for emissions testing of e-cigarette emissions. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Synthetic Route of C8H16O2).

Methyl heptanoate (cas: 106-73-0) 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. 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.Synthetic Route of C8H16O2

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

Untargeted volatile metabolomics using comprehensive two-dimensional gas chromatography-mass spectrometry – A solution for orange juice authentication was written by Li, Shujing;Hu, Yaxi;Liu, Wei;Chen, Ying;Wang, Fei;Lu, Xiaonan;Zheng, Wenjie. And the article was included in Talanta in 2020.Product Details of 112-14-1 The following contents are mentioned in the article:

Orange juice is one of the most consumed fruit juices worldwide and its adulteration has been a long-lasting concern. In this study, an untargeted volatile metabolomics using a comprehensive two-dimensional gas chromatog.-quadrupole mass spectrometry (GC x GC-qMS) was developed to systematically authenticate orange juice. At least 405 citrus whole fruits were collected, belongs to 58 types of orange samples and 23 types of non-orange citrus. The fruit juices were prepared in the laboratory and analyzed using the comprehensive GC x GC-qMS instrument. After optimizing the instrumental settings, this novel method was able to identified 鈭?50 volatiles in each juice sample, covering a variety types of hydrocarbons, esters, alcs., aldehydes, ketones and others. Combining with unsupervised principal component anal. and supervised partial least squares-discriminant anal. , this novel anal. tool was able to authenticate orange juice from a broad perspectives with a high accuracy in the cross-validation model: 1) differentiating orange juice from non-orange citrus juice (99% accuracy), 2) recognizing orange harvesting years (100% accuracy) and geog. origins (96% accuracy), and 3) distinguishing original pure orange juice from the reconstituted juice (94% accuracy). Key volatile metabolites associated with different categories of samples were also identified after thorough investigation of the loading values of the classification models. These metabolites have high potential to be used as food-markers to design targeted anal. methods for orange juice authentication. This novel comprehensive GC x GC-qMS-based method is ideal for governmental laboratories and the food industry to routinely authenticate orange juice. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Product Details of 112-14-1).

Octyl acetate (cas: 112-14-1) 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. 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.Product Details of 112-14-1

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

Synthesis, antifungal activity, and 3D-QSAR study of novel nopol-derived 1,3,4-thiadiazole-thiourea compounds was written by Chen, Ming;Duan, Wen-Gui;Lin, Gui-Shan;Fan, Zhong-Tian;Wang, Xiu. And the article was included in Molecules in 2021.Synthetic Route of C4H7NS The following contents are mentioned in the article:

A series of novel nopol derivatives bearing the 1,3,4-thiadiazole-thiourea moiety I (R = Bu, Ph, 2-MeC₆H₄, etc.) were designed and synthesized by multi-step reactions in search of potent natural product-based antifungal agents. Antifungal activity of the target compounds was evaluated by in vitro methods against Fusarium oxysporum f. sp. cucumerinum, Cercospora arachidicola, Physalospora piricola, Alternaria solani, Gibberella zeae, Rhizoeotnia solani, Bipolaris maydis, and Colleterichum orbicalare at 50渭g/mL. All the target compounds exhibited better antifungal activity against P. piricola, C. arachidicola, and A. solani. Compound I (R =3,4-di-Cl-C₆H₃) showed the best broad-spectrum antifungal activity against all the tested fungi. Compounds I (R = 3-MeC₆H₄, i-Pr, 4-ClC₆H₄) had inhibition rates of 86.1%, 86.1%, and 80.2%, resp., against P. piricola, much better than that of the pos. control chlorothalonil. Moreover, compounds I (R = 3-ClC₆H₄) and I (R = 2-CF₃C₆H₄) held inhibition rates of 80.6% and 79.0% against C. arachidicola and G. zeae, resp., much better than that of the com. fungicide chlorothalonil. In order to design more effective antifungal compounds against A. solani, anal. of the three-dimensional quant. structure-activity relationship (3D-QSAR) was carried out using the CoMFA method, and a reasonable and effective 3D-QSAR model (r² = 0.992, q² = 0.753) has been established and some intriguing structure-activity relationships were found and are discussed by theor. calculation This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Synthetic Route of C4H7NS).

Isopropylisothiocyanate (cas: 2253-73-8) 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.Synthetic Route of C4H7NS

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

Synthesis, antifungal activity, and 3D-QSAR study of novel nopol-derived 1,3,4-thiadiazole-thiourea compounds was written by Chen, Ming;Duan, Wen-Gui;Lin, Gui-Shan;Fan, Zhong-Tian;Wang, Xiu. And the article was included in Molecules in 2021.Formula: C4H7NS The following contents are mentioned in the article:

A series of novel nopol derivatives bearing the 1,3,4-thiadiazole-thiourea moiety I (R = Bu, Ph, 2-MeC₆H₄, etc.) were designed and synthesized by multi-step reactions in search of potent natural product-based antifungal agents. Antifungal activity of the target compounds was evaluated by in vitro methods against Fusarium oxysporum f. sp. cucumerinum, Cercospora arachidicola, Physalospora piricola, Alternaria solani, Gibberella zeae, Rhizoeotnia solani, Bipolaris maydis, and Colleterichum orbicalare at 50渭g/mL. All the target compounds exhibited better antifungal activity against P. piricola, C. arachidicola, and A. solani. Compound I (R =3,4-di-Cl-C₆H₃) showed the best broad-spectrum antifungal activity against all the tested fungi. Compounds I (R = 3-MeC₆H₄, i-Pr, 4-ClC₆H₄) had inhibition rates of 86.1%, 86.1%, and 80.2%, resp., against P. piricola, much better than that of the pos. control chlorothalonil. Moreover, compounds I (R = 3-ClC₆H₄) and I (R = 2-CF₃C₆H₄) held inhibition rates of 80.6% and 79.0% against C. arachidicola and G. zeae, resp., much better than that of the com. fungicide chlorothalonil. In order to design more effective antifungal compounds against A. solani, anal. of the three-dimensional quant. structure-activity relationship (3D-QSAR) was carried out using the CoMFA method, and a reasonable and effective 3D-QSAR model (r² = 0.992, q² = 0.753) has been established and some intriguing structure-activity relationships were found and are discussed by theor. calculation This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Formula: C4H7NS).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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. Formula: C4H7NS

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

Composition variation of the essential oil from Ocimum basilicum L. cv. Genovese Gigante in response to Glomus intraradices and mild water stress at different stages of growth was written by Mota, Iris;Sanchez-Sanchez, Jose;Pedro, Luis G.;Sousa, Maria Joao. And the article was included in Biochemical Systematics and Ecology in 2020.Application of 112-14-1 The following contents are mentioned in the article:

In this study, a factorial experiment was carried out to investigate the effect of AMF (arbuscular mycorrhizal fungi) and water stress on the quality of fresh plants (through the anal. of essential oil composition) and also on the morphol. characteristics (in terms of biomass) of basil (Ocimum basilicum L. cv. Genovese Gigante). The factors included an arbuscular mycorrhizal fungus inoculation (Glomus intraradices), irrigation level (mild water stress, 60% Field capacity) and the interaction of both AMF and water stress. In addition, the effects of harvesting at two different developmental stages were assessed with respect to the plants tolerance to abiotic stress and the quality of the fresh plant. The main essential oil (EO) constituents for this cultivar were eugenol, which varied between 7.1 and 50.8%, and linalool, 17.0-54.7%, in all the samples. The highest relative amount of eugenol (50.8%) was obtained during the vegetative stage in plants under water stress whereas samples from the control presented 16.2% for this compound The samples which were significantly different from the control samples were the WS (water stress) samples from the vegetative stage. Addnl., this study suggests that AMF plants offset the adverse effect of water stress. In this context, and since the interaction of AMF and water stress did not significantly change the fresh plant quality, i.e. the essential oil profile in both stages of development, it is worthwhile considering this method of production Finally, this experiment permitted an understanding of the stressor thresholds of the species used and also that, compensatory responses occur at different time scales, including between generations and also during development (developmental plasticity). This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Application of 112-14-1).

Octyl acetate (cas: 112-14-1) 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.Application of 112-14-1

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