Results 11 to 20 of about 234,249 (389)

Low-level Determination of Residual Methyl Methane Sulfonate and Ethyl Methane Sulfonate in Pharmaceuticals by Gas Chromatography with Mass Spectrometry [PDF]

open access: hybridE-Journal of Chemistry, 2010
A capillary gas chromatographic method using mass spectrometric detection was developed and validated for the trace analysis (ppm level) of methyl methane sulfonate and ethyl methane sulfonate in pharmaceutical drug substances.
M. Sarat   +6 more
doaj   +2 more sources

Barium 5-(tert-butyl)-2,3-dihydroxybenzenesulfonate

open access: yesMolbank, 2022
Catechols and their derivatives attract great scientific interest due to the broad spectrum of their functional properties, including complexation, redox behavior, association ability and antioxidant activity.
Lyubov G. Rubicheva, Daniil A. Lukyanov
doaj   +1 more source

Synthesis and Surface Properties of Oleyl Alcohol Sulfonate Branched-chain Surfactants

open access: yesTaiyuan Ligong Daxue xuebao, 2023
Purposes Waste edible oil is a potential renewable resource, so it is of great significance to convert it into high value-added fine chemical products.
Zimeng WEI   +4 more
doaj   +1 more source

Monosulfonated Azo Dyes: A Crystallographic Study of the Molecular Structures of the Free Acid, Anionic and Dianionic Forms

open access: yesCrystals, 2020
Crystallographic studies of monosulfonated azo dyes have concentrated on the salt forms that contain the azo anion. Here we present a study that compares the structures of these anions with protonated free acid forms and with doubly deprotonated dianion ...
Alan R. Kennedy   +7 more
doaj   +1 more source

Sulfonate vs Sulfonate: Nickel and Palladium Multimetallic Cross-Electrophile Coupling of Aryl Triflates with Aryl Tosylates.

open access: yesJournal of the American Chemical Society, 2020
While phenols are frequent and convenient aryl sources in cross-coupling, typically as sulfonate esters, the direct cross-Ullmann coupling of two different sulfonate esters is unknown.
K. Kang, Liangbin Huang, D. Weix
semanticscholar   +1 more source

Crystal structure of phenyl 2,4,5-trichlorobenzenesulfonate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2016
The title compound, C12H7Cl3O3S, was synthesized via a nucleophilic substitution reaction between phenol and 2,4,5-trichlorobenzenesulfonyl chloride.
Sean Riley   +3 more
doaj   +1 more source

Short-term perfluorooctane sulfonate exposure impairs Leydig cell regeneration in the adult rat testis via targeting hedgehog signaling

open access: yesEcotoxicology and Environmental Safety, 2021
Perfluorooctane sulfonate is related to male reproductive dysfunction in rats and humans. However, the underlying mechanism remains unknown. Here, we reported the effects of short-term exposure to perfluorooctane sulfonate on the regeneration of Leydig ...
Baiping Mao   +7 more
doaj   +1 more source

Preparation of a Carbon-Based Solid Acid Catalyst by Sulfonating Activated Carbon in a Chemical Reduction Process

open access: yesMolecules, 2010
Sulfonated (SO3H-bearing) activated carbon (AC-SO3H) was synthesized by an aryl diazonium salt reduction process. The obtained material had a SO3H density of 0.64 mmol·g-1 and a specific surface area of 602 m2·g-1.
Xiao-Yan Liu   +7 more
doaj   +1 more source

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