Category: 5444-75-7

Fractionation and identification of minor and aroma-active constituents in Kangra orthodox black tea was written by Joshi, Robin;Gulati, Ashu. And the article was included in Food Chemistry in 2015.Product Details of 5444-75-7 The following contents are mentioned in the article:

The aroma constituents of Kangra orthodox black tea were isolated by simultaneous distillation extraction (SDE), supercritical fluid extraction and beverage method. The aroma-active compounds were identified using gas chromatog.-olfactometry-mass spectrometry. Geraniol, linalool, (Z/E)-linalool oxides, (E)-2-hexenal, phytol, β-ionone, hotrienol, methylpyrazine and Me salicylate were major volatile constituents in all the extracts Minor volatile compounds in all the extracts were 2-ethyl-5-methylpyrazine, ethylpyrazine, 2-6,10,14-trimethyl-2-pentadecanone, acetylfuran, hexanoic acid, dihydroactinidiolide and (E/Z)-2,6-nonadienal. The concentrated SDE extract was fractionated into acidic, basic, water-soluble and neutral fractions. The neutral fraction was further chromatographed on a packed silica gel column eluted with pentane and di-Et ether to sep. minor compounds The aroma-active compounds identified using gas chromatog.-olfactometry-mass spectrometry were 2-amylfuran, (E/Z)-2,6-nonadienal, 1-pentanol, epoxylinalool, (Z)-jasmone, 2-acetylpyrrole, farnesyl acetone, geranyl acetone, cadinol, cubenol and dihydroactinidiolide. AEDA studies showed 2-hexenal, 3-hexenol, ethylpyrazine, (Z/E)-linalool oxides, linalool, (E/Z)-2,6-nonadienal, geraniol, phenylethanol, β-ionone, hotrienol and dihydroactinidiolide to be odor active components. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Product Details of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Product Details of 5444-75-7

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Assessing the kinetic model of hydro-distillation and chemical composition of Aquilaria malaccensis leaves essential oil was written by Samadi, Mahtab;Abidin, Zurina Zainal;Yunus, Robiah;Biak, Dayang Radiah Awang;Yoshida, Hiroyuki;Lok, Eng Hai. And the article was included in Chinese Journal of Chemical Engineering in 2017.HPLC of Formula: 5444-75-7 The following contents are mentioned in the article:

This study aimed to model the kinetic of hydro-distillation of Aquilaria malaccensis leaves oil in order to understand and optimize the extraction process. In addition, this study, for the first time, aimed to identify the chem. compositions of the A. malaccensis leave-oil. By assessing both first-order kinetic model and the model of simultaneous washing and diffusion, the result indicated that the model of simultaneous washing and diffusion better described the hydro-distillation mechanism of the essential oil from A. malaccensis leaves. The optimum time, solid to liquid ratio and the heating power for extracting the highest amount of essential oil were found to be around 3 h, 1:10 (g · ml^-1) and 300 W, resp. Yellow essential oil with a strong smell and a yield of 0.05 v/w was extracted by hydro-distillation Clevenger apparatus Chem. compounds of the essential oil were analyzed using gas chromatog.-mass spectroscopy (GC/MS), which resulted in identification of 42 compounds that constitute 93% of essential oil. Among the identified components, Pentadecanal (32.082%), 9-Octadecenal, (Z) (15.894%), and Tetradecanal (6.927%) were the major compounds Considering the fact that all the identified major components possessed pesticidal properties, A. malaccensis leaves could be regarded as a promising natural source for producing pesticides. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7HPLC of Formula: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.HPLC of Formula: 5444-75-7

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Ester – Wikipedia,
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Infrared characterization of MgCl₂ supported Ziegler-Natta catalysts with monoester and diester as a modifier was written by Yang, C. B.;Hsu, C. C.;Park, Y. S.;Shurvell, H. F.. And the article was included in European Polymer Journal in 1994.Application In Synthesis of 2-Ethylhexyl benzoate The following contents are mentioned in the article:

An IR study of MgCl₂-supported TiCl₄ Ziegler-Natta catalysts for propylene polymerization using Lewis base modifiers was carried out. Two series of catalysts were prepared, differing mainly by the method used to prepare the MgCl₂ support. One was prepared by precipitation and the other by ball-milling. Four different Lewis bases, of which two are diesters (di-2-Et phthalate and diisobutyl phthalate) and two are monoesters (Et benzoate and 2-Et hexyl benzoate), were employed. The IR investigation of the catalyst was focused on the identification of complexes formed. The diester-containing catalysts contain significant amounts of TiCl₄-diester complexes and phthaloyl mono- and di-chlorides complexed to MgCl₂, whereas the monoester-containing catalysts are virtually free of these compounds The chlorides are formed from the reaction of TiCl₄ and diester weakly bonded to MgCl₂. The TiCl₄-monoester complex is relatively weak so that the coordination of monoester with MgCl₂ is much more favorable. The effects of the complexes, particularly their relative amounts, on the catalyst activity was investigated by carrying out propylene polymerizations with catalysts prepared by precipitation and by ball-milling method at three different activation temperatures This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Application In Synthesis of 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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.Application In Synthesis of 2-Ethylhexyl benzoate

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Influence of plant growth retardants on quality of Codonopsis Radix was written by Liao, Yinyin;Zeng, Lanting;Li, Pan;Sun, Tian;Wang, Chao;Li, Fangwen;Chen, Yiyong;Du, Bing;Yang, Ziyin. And the article was included in Molecules in 2017.COA of Formula: C15H22O2 The following contents are mentioned in the article:

Plant growth retardant (PGR) refers to organics that can inhibit the cell division of plant stem tip sub-apical meristem cells or primordial meristem cell. They are widely used in the cultivation of rhizomatous functional plants; such as Codonopsis Radix, that is a famous Chinese traditional herb. However, it is still unclear whether PGR affects the medicinal quality of C. Radix. In the present study, amino acid analyses, targeted and non-targeted analyses by ultra-performance liquid chromatog. combined with time-of-flight mass spectrometry (UPLC-TOF-MS) and gas chromatog.-MS were used to analyze and compare the composition of untreated C. Radix and C. Radix treated with PGR. The contents of two key bioactive compounds, lobetyolin and atractylenolide III, were not affected by PGR treatment. The amounts of polysaccharides and some internal volatiles were significantly decreased by PGR treatment; while the free amino acids content was generally increased. Fifteen metabolites whose abundance were affected by PGR treatment were identified by UPLC-TOF-MS. Five of the up-regulated compounds have been reported to show immune activity, which might contribute to the healing efficacy (“buqi”) of C. Radix. The results of this study showed that treatment of C. Radix with PGR during cultivation has economic benefits and affected some main bioactive compounds in C. Radix. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7COA of Formula: C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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. COA of Formula: C15H22O2

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Controlled Extraction Studies Applied to Polyvinyl Chloride and Polyethylene Materials: Conclusions from the ELSIE Controlled Extraction Pilot Study was written by Teasdale, Andrew;Jahn, Michael;Bailey, Simon;Feilden, Andrew;Taylor, Graham;Corcoran, Marta L.;Malick, Robert;Jenke, Dennis;Stults, Cheryl L. M.;Nagao, Lee M.. And the article was included in AAPS PharmSciTech in 2015.COA of Formula: C15H22O2 The following contents are mentioned in the article:

The effective management of leachables in pharmaceutical products is a critical aspect of their development. This can be facilitated if extractables information on the materials used in a packaging or delivery system is available to assist companies in selecting materials that will be compatible with the drug product formulation and suitable for the intended use. The Extractables and Leachables Safety Information Exchange (ELSIE) materials working group developed and executed a comprehensive extraction study protocol that included a number of extraction solvents, extraction techniques, and a variety of anal. techniques. This was performed on two test materials, polyethylene (PE) and polyvinyl chloride (PVC), that were selected due to their common use in pharmaceutical packaging. The purpose of the study was to investigate if the protocol could be simplified such that (i) a reduced number or even a single extraction technique could be used and (ii) a reduced number of solvents could be used to obtain information that is useful for material selection regardless of product type. Results indicate that, at least for the PVC, such reductions are feasible. Addnl., the studies indicate that levels of extractable elemental impurities in the two test materials were low and further confirm the importance of using orthogonal anal. detection techniques to gain adequate understanding of extraction profiles. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7COA of Formula: C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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: C15H22O2

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Study of chemical communication based on urine in tree shrews Tupaia belangeri (Mammalia: Scandentia: Tupaiidae) was written by Wanlong, Z.;Fangyan, Y.;Zhengkun, W.. And the article was included in European Zoological Journal in 2017.Recommanded Product: 2-Ethylhexyl benzoate The following contents are mentioned in the article:

Chem. communication plays a key role in mammalian reproductive and social behavior. The chem. constituents of urine are the main signal resource that can encode sex, quality and social status. In order to investigate the role of urine in the reproductive biol. of Tupaia belangeri, the volatile components of urine were analyzed by gas chromatog.-mass spectrometry, and the behavior of the tree shrew in response to urinary odor was investigated in a Y-maze test. The results show that hydrocarbons were the major components of urine in wild, acclimated and laboratory-breeding animals. The concentrations of the chem. components in urine from individuals in the wild population were higher than those in the acclimated and breeding animals. Tupaia belangeri showed significant differences in reactions of individuals and urinary odor. Males and females had different components in their urine. The stay duration of male tree shrews to the urinary odor of females in oestrus or lactating was significantly longer than that to the odor of pregnant females. The chem. components were different at different reproductive stages. Taken together, these results suggest that the odor of urine can encode female reproductive status and gender. Tupaia belangeri relies on these odours to recognize sex and choose a mate. Chem. communication based on signals in urine plays an important role in the reproduction of T. belangeri. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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.Recommanded Product: 2-Ethylhexyl benzoate

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

High pressure NMR studies of confined liquids was written by Jonas, J.;Zhang, Jing;Xu, Shu. And the article was included in Materials Research Society Symposium Proceedings in 1993.Related Products of 5444-75-7 The following contents are mentioned in the article:

The main goal of the novel NMR experiments on confined liquids was to determine the effects of pressure on the dynamics of liquids in the surface layer by using the 2-state, fast exchange model and to compare them to the pressure effects observed for bulk liquids With this goal in mind, the deuteron NMR spin-lattice relaxation times (T₁) in liquid pyridine-d₅, PhNO₂-d₅, and methylcyclohexane-d₁₄ confined to sol-gel porous silica glasses with pore radii at from 18 Å to 96 Å were measured as a function of pressure ≤ 5 kbar at 300 K. In another set of high resolution natural abundance ¹³C NMR experiments, the ¹³C relaxation behavior of each carbon in 2-ethylhexyl benzoate model lubricant was measured as a function of pressure in porous silica glasses. In fact, this exptl. approach (which allows study of the effects of pressure on the dynamic behavior of surface-layer liquids) may provide a new tool in studies of model liquid lubricants at extreme conditions of pressure and temperature In addition, selected results of a recent study of MeCN-d₃ are reviewed. The ²H and ¹⁴N spin-lattice relaxation times of MeCN-d₃ in porous silica glasses were measured to study the confinement effects on the anisotropic reorientation characterized by rotational diffusion consts, D_⊥ and D_‖, of this sym.-top mol. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Related Products of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.Related Products of 5444-75-7

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

High-Resolution ¹³C NMR Study of Liquid 2-Ethylhexyl Benzoate Confined to Porous Silica Glasses was written by Zhang, Jing;Jonas, Jiri. And the article was included in Journal of Physical Chemistry in 1994.Product Details of 5444-75-7 The following contents are mentioned in the article:

Natural abundance carbon-13 NMR spin-lattice relaxation times, T₁, and spin-spin relaxation times, T₂, in the model liquid lubricant 2-ethylhexyl benzoate (I), confined to porous silica glasses prepared by the sol-gel process, were measured as a function of pore size at 294 K for pore radius 21-80 Å. In agreement with earlier results for other polar liquids, the two-state fast-exchange model was valid for the spin-relaxation data for I (i.e., the 1/T₁ rates scale as 1/R with pore radius R). The anal. of the 1/T₁ data for each carbon in confined I in terms of the two-state fast-exchange model allowed the calculation of the relaxation rates 1/T_1S for each carbon of I in the surface layer. The comparison of 1/T_1S for each carbon with the 1/T₁ values for individual carbons in bulk I provided information on motional dynamics of I at the liquid/surface interface. The exptl. ¹³C spin-spin relaxation rates 1/T₂ obey the quadratic power law 1/R² for confined I, confirming that at low frequency, the pure geometric confinement effects dominate over surface interaction effects. Addnl. information on the I surface interactions was obtained by carrying out the NMR experiments with surface-modified silica glasses. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Product Details of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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, including apples, durians, pears, bananas, pineapples, and strawberries. 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.Product Details of 5444-75-7

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

Characterization of odor-active compounds in the head, heart, and tail fractions of freshly distilled spirit from Spine grape (Vitis davidii Foex) wine by gas chromatography-olfactometry and gas chromatography-mass spectrometry was written by Xiang, Xiao-Feng;Lan, Yi-Bin;Gao, Xiao-Tong;Xie, Han;An, Zhao-Yan;Lv, Zhi-Hao;Yin-Shi;Duan, Chang-Qing;Wu, Guang-Feng. And the article was included in Food Research International in 2020.Computed Properties of C15H22O2 The following contents are mentioned in the article:

Differences in key odor-active volatile compounds among the head, heart, and tail fractions of freshly distilled spirits from Spine grape (Vitis davidii Foex) wine were identified for the first time by gas chromatog.-olfactometry and gas chromatog.-mass spectrometry. Results from aroma extract dilution anal. (AEDA) showed that there were 34, 45, and 37 odor-active compounds in the head, heart and tail fractions, resp. Besides, 20, 22, and 17 quantified compounds, resp., showed odor activity values (OAVs) > 1. The head fraction was characterized by fruity, fusel/solvent notes owing to higher concentrations of higher alcs. and esters, while the tail fraction had more intense smoky/animal, sweaty/fatty attributes due to higher concentrations of volatile phenols and fatty acids. Finally, the heart fraction was characterized by Et octanoate, Et hexanoate, Et 3-phenylpropanoate, Et cinnamate, isoamyl alc., guaiacol, 4-ethylguaiacol, 4-vinylguaiacol, 2,3-butanedione, and (E)-β-damascenone. Furthermore, observation of the distillation progress indicated that different volatiles with various b.ps. and solubilities followed diverse distillation patterns: concentrations of most esters, higher alcs., terpenes and C13-norisoprenoids decreased, while concentrations of volatile phenols, fatty acids and some aromatic compounds increased during distillation As a result, their final concentrations in the three distillate fractions varied significantly. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Computed Properties of C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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.Computed Properties of C15H22O2

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Ester – an overview | ScienceDirect Topics

Vertical profile and assessment of soil pollution from a typical coking plant by suspect screening and non-target screening using GC/QTOF-MS was written by Liu, Mingyuan;Guo, Changsheng;Zhu, Chaofei;Lv, Jiapei;Yang, Wenlong;Wu, Linlin;Xu, Jian. And the article was included in Science of the Total Environment in 2022.Product Details of 5444-75-7 The following contents are mentioned in the article:

A comprehensive workflow for suspect screening and non-target screening with gas chromatog. coupled with quadrupole time-of-flight mass spectrometry (GC/QTOF-MS) was used to characterize the pollution characteristics of soil samples in a typical coking plant in China. Suspect screening confirmed 57 chems. including PAHs, alkyl PAHs, and phthalates contained in high-resolution personal compound database and library (PCDL). Non-target screening detected 88 chems. from soil samples in the NIST 17 library. A total of 122 chems. were screened in soil samples, and many of them were of emerging concern. Their presence in the soil obtained from coking operations was underestimated, such as the oxygenated PAHs (naphtho[2,1-b]furan and 9H-fluoren-9-one), and the alkyl biphenyls compounds (4,4′-dimethylbiphenyl, 3,3′-dimethylbiphenyl, 4-methyl-1,1′-biphenyl and 2,2′,5,5′-tetramethyl-1,1′-biphenyl). Toxicity assays by luminescent bacteria proved that the extracts from soil samples at different depths showed varying toxicity to V. qinghaiensis sp.-Q67. Soil extracts from a depth of 20-40 cm exhibited the greatest toxicity to luminescent bacteria compared with the other six-layered soil samples, which was correlated with the number of detectable pollutants and total organic carbon content. This study provided a screening method for suspect and non-target contaminants in urban industrial soil sites, which was important in identifying localized contamination sources. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Product Details of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Product Details of 5444-75-7

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