Category: 620-92-8

Development and validation of a method for determination of 17 endocrine disrupting chemicals in milk, water, blood serum and feed by UHPLC-MS/MS was written by Di Marco Pisciottano, Ilaria;Albrizio, Stefania;Guadagnuolo, Grazia;Gallo, Pasquale. And the article was included in Food Additives & Contaminants, Part A in 2022.Quality Control of 4,4′-Methylenediphenol The following contents are mentioned in the article:

The concern for human exposure to bisphenol A (BPA) has led to the introduction of other bisphenols to be used as substitutes in industrial processes. These compounds show activity similar to BPA as endocrine disruptors and could be already widespread both in the environment and in food. To monitor their possible occurrence in the food chain, an anal. method based on affinity chromatog. clean-up and UHPLC coupled to tandem mass spectrometry detection was developed and inhouse validated according to European law, for simultaneous determination of 17 bisphenols in milk and blood serum from bovine and buffalo, in drinking water and in feed. The anal. performance parameters of the method for these matrixes were determined The results showed satisfactory precision in terms of relative standard deviation (3.3%-21.4%), overall good trueness as mean percentage recoveries (77.0%-119.4%), with the only exception of bisphenol PH and bisphenol S in milk and BPA diglycidyl ether in serum. The high specificity and sensitivity of the method allowed us to determine the analytes at very low concentrations, i.e., 0.01-1.0 ng/mL in water, 0.1-2.0 ng/mL in milk, 0.01-1.0 ng/g in blood serum and 1.0-10.0 ng/g in feed. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Quality Control of 4,4′-Methylenediphenol).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Alcohols are weak acids. The most acidic simple alcohols (methanol and ethanol) are about as acidic as water, and most other alcohols are somewhat less acidic. Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions. Oxidation of organic compounds generally increases the number of bonds from carbon to oxygen (or another electronegative element, such as a halogen), and it may decrease the number of bonds to hydrogen.Quality Control of 4,4′-Methylenediphenol

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Development of smart epoxy coating through click reaction using a vegetable oil was written by Ramezanpour, Javad;Ataei, Shahla;Khorasani, Saied Nouri. And the article was included in Progress in Organic Coatings in 2022.Electric Literature of C13H12O2 The following contents are mentioned in the article:

Two-component microcapsules of acrylated epoxidized soybean oil as a healing agent and trimethylolpropane tris(3-mercaptopropionate) as hardener, were encapsulated with the poly(Me methacrylate) shell by solvent evaporation method. The chem. structure and morphologies of the core/shell microcapsules were confirmed using Fourier-transform IR spectroscopy and Field emission SEM, resp. The thermal properties of the microcapsules were investigated through thermogravimetric anal. FE-SEM confirmed that both types of microcapsules have a spherical shape with an average diameter of approx. 6.2μm. The two-component microcapsules were included in epoxy resin, and the healing performance of the system was assessed. From Electrochem. impedance spectroscopy and salt spray test, the best self-healing performance was obtained for 0.5 wt% two-component microcapsules. For epoxy coatings containing 0.5 weight% of microcapsules, after five months of exposure under salt water 3.5%, no corrosion effect was observed on the epoxy coating, indicating that there are enough high-performance materials in the microcapsules to heal cracks and the click reaction has been a very effective reaction to create this healing resin. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Electric Literature of C13H12O2).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Grignard and organolithium reagents are powerful tools for organic synthesis, and the most common products of their reactions are alcohols.Electric Literature of C13H12O2

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Alcohol – Wikipedia,
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Effects of consumer products chemicals ingredients and their mixtures on the estrogen receptor/androgen receptor transcriptional activation was written by Lee, Handule;Park, Juyoung;Park, Kwangsik. And the article was included in Chemosphere in 2022.Recommanded Product: 620-92-8 The following contents are mentioned in the article:

Unlike the environmental pollutants or industrial chems., the chems. in consumer products may pose higher levels of risks, depending on how the chems. are used in the products and how humans interact with the products. Recently, endocrine disrupting chems. in cosmetics, personal care products, cleaners, sunscreens, and vinyl products were anal. quantified and many active chems. including phthalates, parabens and bisphenols were detected. This indicates a wide range of exposures from common products. In this study, 35 chems. known to be ingredients of consumer products were selected and screened for the transactivation of estrogen receptors and androgen receptors. From the results of individual chems., the activity of binary/ternary mixture prepared from the agonists for the ER transcription activity was measured, and compared to the predicted values obtained by the full logistic model. The measured and the predicted values were found to be very similar. This study may suggest that prediction of mixture activity by proper models would be one of the supportive tools for the risk assessment and sound regulation of chem. mixtures which have potential endocrine disrupting effects in consumer products. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Recommanded Product: 620-92-8).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Alcohols are among the most common organic compounds. They are used as sweeteners and in making perfumes, are valuable intermediates in the synthesis of other compounds, and are among the most abundantly produced organic chemicals in industry. Secondary alcohols are easily oxidized without breaking carbon-carbon bonds only as far as the ketone stage. No further oxidation is seen except under very stringent conditions.Recommanded Product: 620-92-8

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Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Capillary electrophoresis-mass spectrometry analysis of bisphenol A and its analogues in bottled tea beverages with dynamic pH focusing was written by Yahaya, Noorfatimah;Huang, Zi-ao;Yan, Binjun;Chen, David D. Y.. And the article was included in Food Chemistry in 2022.Recommanded Product: 620-92-8 The following contents are mentioned in the article:

A simple and sensitive method for the determination of bisphenol A and its analogs at the ng/mL level in bottled tea beverages is presented. This method utilized a dynamic pH junction to focus the analyte into a more concentrated zone, based on the electrophoretic mobility difference of analytes in the sample matrix and background electrolytes in capillary electrophoresis coupled to mass spectrometry (CE-MS). The optimized analyte focusing led to enhanced signal detection with average peak heights for five bisphenols of 53-170 folds higher than conventional injections. Under optimized conditions, the method showed good linearity in the range of 0.1-100 ng/mL, excellent limits of detection (0.03-0.04 ng/mL), good analyte recovery (80.3-118.1%) with acceptable relative standard deviations (<12%). The limits of quantifications were below the maximum permissible content of bisphenol A set by the European Commission for this product. This method was used to quant. analyze bisphenols in six different kinds of bottled tea beverages, making it a promising tool for practical applications. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Recommanded Product: 620-92-8).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. The oxygen atom of the strongly polarized O―H bond of an alcohol pulls electron density away from the hydrogen atom. This polarized hydrogen, which bears a partial positive charge, can form a hydrogen bond with a pair of nonbonding electrons on another oxygen atom. Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions. Oxidation of organic compounds generally increases the number of bonds from carbon to oxygen (or another electronegative element, such as a halogen), and it may decrease the number of bonds to hydrogen.Recommanded Product: 620-92-8

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Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lewis Acid-Promoted Typical Friedel-Crafts Reactions Using DMSO as a Carbon Source was written by Vodnala, Nagaraju;Singh, Sanjay;Hazra, Chinmoy Kumar. And the article was included in Journal of Organic Chemistry in 2022.Quality Control of 4,4′-Methylenediphenol The following contents are mentioned in the article:

A mild and efficient synthetic protocol for the synthesis of sym. and unsym. diarylmethanes (DAMs) R¹CH₂R² (R¹ = 4-methoxyphenyl, 2,4,6-trimethylphenyl, 1H-indol-3-yl, 4-hydroxy-2-oxo-2H-chromen-3-yl, etc.; R² = 4-hydroxy-3,5-dimethylphenyl, 5-methylfuran-2-yl, 4-amino-3,5-bis(propan-2-yl)phenyl, etc.) was reported. Using DMSO as the C₁ source and TMSOTf as the Lewis acid promoter, a series of functionalized sym. and unsym. DAMs was synthesized in high yields. Gratifyingly, DMSO plays a dual role as a solvent and a C₁ source and can also be replaced with its deuterated counterpart, DMSO-d₆, enabling the incorporation of the -CD₂ moiety into the diarylmethane skeleton. The developed approach has been applied to a wide range of substrates having various functional groups, and this protocol has also been extended to the synthesis of an anti-breast cancer agent and an anticoagulant agent using common feedstock compounds In addition, the postulated mechanism has been explicitly demonstrated via control experiments This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Quality Control of 4,4′-Methylenediphenol).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.Quality Control of 4,4′-Methylenediphenol

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Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Transiently gene-modulated cell reporter for ultrasensitive detection of estrogen-like compounds in tap water was written by Ren, Yun;Zheng, Jing;Wang, Hailin. And the article was included in Chemosphere in 2022.Name: 4,4′-Methylenediphenol The following contents are mentioned in the article:

Abnormal elevation of indispensable steroid hormone estrogens and exposure to exogenous estrogen-like compounds pose adverse health effects to aquatic animals and human alike. These compounds generally display functionally important estrogenic activity even at extremely low picomolar concentrations In this study we identified one critical but lethal gene (TAF1) that remarkably represses estrogenic activity. This gene is selected as a candidate for genetically modulating an estrogen-responding cell line. To overcome its lethality, instead of adopting a gene knockout strategy, we developed a transient TAF1 depletion strategy using a designed small interfering RNA. By the transient knockdown of TAF1 in the estrogen-responding reporter cell line, the maximum induction signals for endogenous estrogen 17β-estradiol (E2) and environmental estrogens 17α-ethynyl estradiol (EE2) and bisphenol compounds were enhanced by 4.8-13.3 folds. The limit of detection for EE2 is about 8 x 10-15 mol/L. Moreover, by the established method, trace estrogenic activity (14.7-24.2 pg E2 equiv (E2Eq)/L) can be detected in a portion of Tap water samples. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Name: 4,4′-Methylenediphenol).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Under appropriate conditions, inorganic acids also react with alcohols to form esters. To form these esters, a wide variety of specialized reagents and conditions can be used. Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions. Oxidation of organic compounds generally increases the number of bonds from carbon to oxygen (or another electronegative element, such as a halogen), and it may decrease the number of bonds to hydrogen.Name: 4,4′-Methylenediphenol

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Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Next-generation biomonitoring of the early-life chemical exposome in neonatal and infant development was written by Jamnik, Thomas;Flasch, Mira;Braun, Dominik;Fareed, Yasmin;Wasinger, Daniel;Seki, David;Berry, David;Berger, Angelika;Wisgrill, Lukas;Warth, Benedikt. And the article was included in Nature Communications in 2022.Related Products of 620-92-8 The following contents are mentioned in the article:

Exposure to synthetic and natural chems. is a major environmental risk factor in the etiol. of many chronic diseases. Investigating complex co-exposures is necessary for a holistic assessment in exposome-wide association studies. In this work, a sensitive liquid chromatog.-tandem mass spectrometry approach was developed and validated. The assay enables the anal. of more than 80 highly-diverse xenobiotics in urine, serum/plasma, and breast milk; with detection limits generally in the pg-ng mL-1 range. In plasma of extremely-premature infants, 27 xenobiotics are identified; including contamination with plasticizers, perfluorinated alkylated substances and parabens. In breast milk samples collected longitudinally over the first 211 days post-partum, 29 analytes are detected, including pyrrolizidine- and tropane alkaloids which have not been identified in this matrix before. A preliminary estimation of daily toxicant intake via breast milk is conducted. In conclusion, we observe significant early-life co-exposure to multiple toxicants, and demonstrate the method′s applicability for large-scale exposomics-type cohort studies. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Related Products of 620-92-8).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Tertiary alcohols cannot be oxidized at all without breaking carbon-carbon bonds, whereas primary alcohols can be oxidized to aldehydes or further oxidized to carboxylic acids.Related Products of 620-92-8

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Alcohol – Wikipedia,
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Rational design of 2D ultrathin BiO(HCOO)_xI_1-x composite nanosheets: The synergistic effect of ultrathin structure and hybridization in the effective elimination of BPA under visible light irradiation was written by Wang, Qiao;Lv, Guanheng;Cao, Yiting;Chen, Zhenhui;Jia, Jialin;Qin, Yanlin;Lin, Zhenxuan;Xie, Xuan;Wang, Zhihong. And the article was included in Separation and Purification Technology in 2022.Safety of 4,4′-Methylenediphenol The following contents are mentioned in the article:

Here, a novel series of 2D bismuth oxide formate-x composites were first fabricated with a ultrathin thickness (∼2.47 nm). Among them, the optimal BiO(HCOO)_0.75I_0.25 nanosheets exhibited a superior photocatalytic performance with the kinetic constant reaching up to 0.2148 min-1, which was 5.9, 97.6 and 27.2 folds higher than that of pristine BiOI, BiOCOOH and BiO(HCOO)_0.75I_0.25-P nanoplates, resp. Benefiting from the synergistic effect of ultrathin two-dimensional structure and hybrid composite, the photocatalytic performance was signally improved. Based on the optical and photoelectrochem. characterizations, the fabrication of hybrid composite delivered the optimal balance of visible-light absorption and redox capacity, endowing the photoinduced holes a higher oxidation potential. Meanwhile, the construction of 2D ultrathin structure reduced the migration distance of charge carriers, consequently accelerated those separated rate. This study provides a new insight for designing high active Bi-based photocatalysts, which is hopeful to make a great contribution to aquatic environmental restoration. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Safety of 4,4′-Methylenediphenol).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Secondary alcohols are easily oxidized without breaking carbon-carbon bonds only as far as the ketone stage. No further oxidation is seen except under very stringent conditions.Safety of 4,4′-Methylenediphenol

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Alcohol – Wikipedia,
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Toxicological profile of bisphenol F via comprehensive and extensive toxicity evaluations following dermal exposure was written by Lee, Sang-Sik;Ryu, Hyeon-Yeol;Ahn, Kyu-Sup;Lee, Somin;Lee, Jiho;Lee, Jae Won;Ko, Soo Min;Son, Woo-Chan. And the article was included in Journal of Toxicology and Environmental Health in 2022.Category: alcohols-buliding-blocks The following contents are mentioned in the article:

Bisphenol F (BPF) is classified as a harmful substance by the U. S. Environmental Protection Agency. Although previous studies focused on human exposure to BPF via direct consumption or inhalation, few investigators assessed potential toxicol. effects following skin contact. The aim of this study was to examine (1) the degree and pattern by which BPF is absorbed onto the skin in vivo, and (2) determination of toxicity and safety using the following tests: acute dermal; a 28-day repeat dermal; a skin irritation; an eye irritation; and a skin sensitization. As indicated by the amount of BPF remaining in the epidermis or dermis, data demonstrated that BPF was absorbed through the skin at a 26.5% rate. BPF penetrated the s.c. layer at a “fast rate” (Kp: 2.2E-02). Although no toxicol. changes or local irritation were observed following skin exposure, BPF induced potent sensitization. In summary, the findings of this study showed that BPF penetrated and was absorbed into the skin at a high rate which was associated with enhanced chem.-induced skin sensitization and this may have significant implications following exposure of skin to BPF. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Category: alcohols-buliding-blocks).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Category: alcohols-buliding-blocks

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Alcohol – Wikipedia,
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Bisphenol A and its structural analogues in infant formulas available in the Brazilian market: Optimisation of a UPLC-MS/MS method, occurrence, and dietary exposure assessment was written by Petrarca, Mateus Henrique;Perez, Mary Angela Favaro;Tfouni, Silvia Amelia Verdiani. And the article was included in Food Research International in 2022.SDS of cas: 620-92-8 The following contents are mentioned in the article:

For the first time, structural analogs to bisphenol A were investigated in infant formulas marketed in Brazil. A fast and high throughput UPLC-MS/MS method was established for simultaneous anal. of bisphenol A, B, E, F, and S in complex infant formula matrixes. The influence of mobile phase composition on electrospray ionization response in neg. mode was studied to improve the detectability of the method. As also, the main sample preparation variables that could affect the extraction and cleanup were screened by the Plackett-Burman design. The method performance characteristics were adequate, including reliable limits of detection (5-10 μg kg-1) and quantification (10-20 μg kg-1) with suitable recoveries (84.2-108.9 %) and precision (≤18 %). Sixty-one infant formulas were analyzed, and 36 % of total samples contained at least one bisphenol analog, whose levels ranged between 10.9 and 198.9 μg kg-1. Based on a deterministic approach, the estimated daily intakes for babies up to 6 mo old, fed exclusively with infant formula, were below the temporary tolerable daily intake of 4 μg kg-1 body weight set for bisphenol A by the European Food Safety Authority. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8SDS of cas: 620-92-8).

4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Under appropriate conditions, inorganic acids also react with alcohols to form esters. To form these esters, a wide variety of specialized reagents and conditions can be used. Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions. Oxidation of organic compounds generally increases the number of bonds from carbon to oxygen (or another electronegative element, such as a halogen), and it may decrease the number of bonds to hydrogen.SDS of cas: 620-92-8

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts