Category: 3811-73-2

Biehl, Zulfe Urbano published the artcile< Review of the scientific and technological literature of fungicides in tannery industry: reducing the use and increasing the efficiency of fungicides in the leather industry>, Product Details of C5H4NNaOS, the main research area is fungicide biocide phylogenetics biodeterioration ergosterol azoles microbial fungi.

One of the main challenges of the tannery industry chain is to reduce the use of biocides and restricted substances and at the same time increase efficiency with the available products. Such conduct must permeate suppliers and the tanneries in order to obtain better results, diminish the biocide resistance dissemination, optimize costs and be ecol. friendly. In this sense, we present herein an updated review and discussion of the scientific and technol. literature on the aspects involving the action of fungicides in tannery industry and how the application of this knowledge can reduce application of biocides and restricted substances in the tanning process. We have organized a review by consulting the databases PUBMED, Web of Science, Science direct, and all literature with excellence scientific support available. The review focused on: (i) Fungal diversity involved in wet-blue biodeterioration; (ii) Mechanisms of action of fungicides; (iii) Fungicide combinations to enhance activity; (iv) Fungal mechanisms of resistance and the known causes of resistance emergence. As a result of this study we are able to track the fungal phylogenetics (and relationship) responsible for leather biodeterioration enabling a guiding strategy for fungal biocide application. Moreover, understanding of the mechanisms of action and interaction between mols. can determines the extent of the biocides inhibitory effect in different fungal species. Fungicide effect could vary, and such information corroborates with the idea that even in the same species the interaction of the different mols. may vary, possibly due to variation in cytochrome protein. For example, the most accepted mechanism of action of azoles is the inhibition of synthesis of or direct interaction with ergosterol (present in all fungi). Considering that the target is always the same, a question arise, how do the distinct azoles present different activities upon fungal strains. As result of this study we show that structural differences will influence the higher or lower interaction of the azole functional group and consequently the activity. The appropriated knowledge of the mechanisms by which microbial cells might develop resistance, highlights the need for an improved understanding of the reasons for their emergence and greater attention to methods that can be used to prevent and control them. In this sense, a successful combination of biocide mols. enhances a synergetic effect, avoiding fungal mechanisms of resistance and reduces dosage of each compound, being effective against a variety of fungi.

Journal of AQEIC published new progress about Alternaria. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Product Details of C5H4NNaOS.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Schubert, S.; Brans, R.; Reich, A.; Hansen, A.; Buhl, T.; Skudlik, C.; Mempel, M.; Schoen, M. P.; John, S. M.; Geier, J. published the artcile< Assessment of occupational exposure and spectrum of contact sensitization in metalworkers with occupational dermatitis: results of a cohort study within the OCCUDERM project>, Recommanded Product: 2-Mercaptopyridinen-oxide sodiumsalt, the main research area is occupational exposure contact sensitization dermatitis.

Background : Metalworkers occupationally exposed to metals, tools, metalworking fluids (MWFs), tech. oils, gloves, skin care products etc. frequently suffer from occupational dermatitis (OD). Objectives : To investigate occupational exposure and to identify relevant occupational sensitizers in metalworkers with OD, and to evaluate suitability of current German patch test recommendations for this occupational group. Patients and methods : As part of the OCCUDERM project, occupational exposure of 230 metalworkers with suspected OD patch tested in the departments of dermatol. in Goettingen and Osnabrueck (both Lower Saxony, Germany) in 2012-2017 was recorded by questionnaire. These data, as well as results, of patch testing with standardized allergens and with workplace material were analyzed. Results : Metalworking fluids and skin care products were the most important exposures. Among MWF allergens, most frequently sensitizations to formaldehyde and formaldehyde releasers, colophony/abietic acid and monoethanolamine were observed Sensitization to methylisothiazolinone (MI) was frequent, probably as part of the general European epidemic of contact allergy to MI in leave-on cosmetics. Sensitization to glove ingredients only played a minor role. Conclusions : The known occupational allergen spectrum could largely be confirmed. In order not to miss relevant sensitizations, patch testing with material from the patients workplaces in parallel to baseline and MWF series is recommended. Sensitizations diagnosed could not always be linked to particular occupational exposures.

Journal of the European Academy of Dermatology and Venereology published new progress about Allergic contact dermatitis. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Recommanded Product: 2-Mercaptopyridinen-oxide sodiumsalt.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Turley, Alexandra E.; Isaacs, Kristin K.; Wetmore, Barbara A.; Karmaus, Agnes L.; Embry, Michelle R.; Krishan, Mansi published the artcile< Incorporating new approach methodologies in toxicity testing and exposure assessment for tiered risk assessment using the RISK21 approach: Case studies on food contact chemicals>, Recommanded Product: 2-Mercaptopyridinen-oxide sodiumsalt, the main research area is food contact chem toxicity risk assessment RISK21 approach; Dibutyltin dichloride; Food additive; High-throughput screening; In-vitro in-vivo extrapolation; RISK21; Sodium (2-pyridylthio)-N-Oxide (pyrithione sodium); ToxCast.

Programs including the ToxCast project have generated large amounts of in vitro high-throughput screening (HTS) data, and best approaches for the interpretation and use of HTS data, including for chem. safety assessment, remain to be evaluated. To fill this gap, we conducted case studies of two indirect food additive chems. where ToxCast data were compared with in vivo toxicity data using the RISK21 approach. Two food contact substances, sodium (2-pyridylthio)-N-oxide and dibutyltin dichloride, were selected, and available exposure data, toxicity data, and model predictions were compiled and assessed. Oral equivalent doses for the ToxCast bioactivity data were determined by in-vitro in-vivo extrapolation (IVIVE). For sodium (2-pyridylthio)-N-oxide, bioactive concentrations in ToxCast assays corresponded to low- and no-observed adverse effect levels in animal studies. For dibutyltin dichloride, the ToxCast bioactive concentrations were below the dose range that demonstrated toxicity in animals; however, this was confounded by the lack of toxicokinetic data, necessitating the use of conservative toxicokinetic parameter estimates for IVIVE calculations This study highlights the potential utility of the RISK21 approach for interpretation of the ToxCast HTS data, as well as the challenges involved in integrating in vitro HTS data into safety assessments.

Food and Chemical Toxicology published new progress about Chemical safety. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Recommanded Product: 2-Mercaptopyridinen-oxide sodiumsalt.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Jian, Wenyuan; Jin, Zhengyu; Yang, Jing; Meng, Guozhe; Liu, Hongfang; Liu, Hongwei published the artcile< Anticorrosion and antibiofouling performance of in-situ prepared layered double hydroxide coating modified by sodium pyrithione on aluminum alloy 7075>, SDS of cas: 3811-73-2, the main research area is sodium pyrithione layered double hydroxide anticorrosion antibiofouling coating alloy.

The anticorrosion and antibiofouling of marine engineering equipments have strong demands, especially for antibiofouling. In this work, an in-situ growth layered double hydroxide (LDH) coating on aluminum alloys (AA) 7075 was prepared and then modified by sodium pyrithione (SPT) to increase the anticorrosion and antibiofouling performance. Results indicated that CoAl-LDHs and CoAl-LDHs-SPT coatings had been successfully prepared according to TEM, XRD, XPS, Raman spectra, and SEM anal. results. The (0 1 2) plane of LDHs with a interplanar spacing of 0.26 nm was recognized from TEM images. The content of SPT in CoAl-LDHs-SPT is 38.79 weight%. Electrochem. impedance spectroscopy (EIS) and polarization curves demonstrate that the corrosion resistance of AA 7075 was largely improved in the presence of CoAl-LDHs and CoAl-LDHs-SPT coatings while the anticorrosion performance of CoAl-LDHs-SPT coating was better. The corrosion resistance of Co-Al LDHs-SPT coating increased by about two orders of magnitude compared with the bare AA 7075. The surface anal. results show that only a few Pseudomonas aeruginosa and Spirulina cells attached to the CoAl-LDHs coating surface, and no biofouling cells were observed for the CoAl-LDHs-SPT coating. Co-Al LDHs-SPT coating possessed the best anticorrosion and antibiofouling properties due to the presence of SPT compared with the CoAl-LDHs coating.

Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) published new progress about Anion exchange. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, SDS of cas: 3811-73-2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wu, Wen Xin; Liu, Hu Cheng; Jin, Wei Jun published the artcile< Halogen Bonding Adsorbent Pyridine N-oxides for Iodine Capture in Water>, Recommanded Product: 2-Mercaptopyridinen-oxide sodiumsalt, the main research area is anthracene naphthaline pyridine oxide adsorbent single crystal surface structure; SC-SC transformation; halogen bonds; iodine capture; nonporous materials; pyridine N-oxide.

Rapid capture of 129I with high volatility and toxicity in the environment has attracted much attention. Herein we reported a firstly synthesized nonporous material: pyridine N-oxides (NTPO and ATPO) as iodine adsorbent. Both of NTPO and ATPO exhibit remarkable performance on the adsorption of iodine in aqueous solution, vapor state and organic solvents. Upon the capture of iodine, pyridine N-oxides were transformed to binary cocrystals combined with the pyridine N-oxides and iodine which is driven by halogen bond between iodine and oxygen atoms. Moreover, pyridine N-oxides shows high chem., thermal and moisture stability.

Chemistry – A European Journal published new progress about Adsorption. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Recommanded Product: 2-Mercaptopyridinen-oxide sodiumsalt.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Gajeles, Ghellyn; Kim, Se Mi; Yoo, Jong-Cheol; Lee, Kyung-Koo; Lee, Sang Hee published the artcile< Recyclable anhydride catalyst for H2O2 oxidation: N-oxidation of pyridine derivatives>, Category: pyridine-derivatives, the main research area is pyridine oxide green preparation; oxidation pyridine poly maleic anhydride alt octadecene catalyst.

The catalytic efficiency and recyclability of poly(maleic anhydride-alt-1-octadecene) (Od-MA) and poly(maleic anhydride-alt-1-isobutylene) (Bu-MA) were evaluated for use in the development of a metal-free, reusable catalyst for the oxidation of pyridines to pyridine N-oxides, such as I [R = 2-Cl, 3-Br, 2-CO2H, etc.] in the presence of H2O2. The Od-MA catalyst was easily recovered via filtration with recovery yields exceeding 99.8%. The catalyst retained its activity after multiple uses and did not require any treatment for reuse. The Od-MA and H2O2 catalytic system described herein was eco-friendly, operationally simple, and cost-effective; thus, it was industrially applicable. Od-MA and H2O2 could potentially be used in place of percarboxylic acid as an oxidant in a wide range of oxidation reactions.

RSC Advances published new progress about Green chemistry. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ziolkowska, Dorota; Syrotynska, Iryna; Shyichuk, Alexander; Lamkiewicz, Jan published the artcile< Determination of SLES in personal care products by colloid titration with light reflection measurements>, Quality Control of 3811-73-2, the main research area is sodium laureth sulfate personal care product colloid titration; PDADMAC; PDDA; cationic polymer; polyDADMAC; quantitation of surfactants; turbidity.

The method of colloid titration with poly(diallyldimethylammonium) chloride has been improved to detect the endpoint with an off-vessel light reflectance sensor. The digital color sensor used measures light reflectance by means of light guides, with no immersion into the reaction solution In such a method, the optical signal is free of disturbances caused by sticky flocs in the solution The improved automatic titration set was applied for the determination of sodium laureth sulfate (SLES) in industrial batches and com. personal care products. The sample color and opacity do not disturb the SLES quantification. When the SLES content lies in the range from 5% to 9%, the optimal sample weight is from 6 g to 3 g.

Molecules published new progress about Almond. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Quality Control of 3811-73-2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ngcephe, Ayanda M.; Sinha, Manish Kumar; Purcell, Walter published the artcile< Solvent extraction and separation of palladium from platinum group elements: Synthesis and characterization of 2-mercaptopyridine N-oxide-palladium (II) complex>, COA of Formula: C5H4NNaOS, the main research area is palladium solvent extraction mercaptopyridine oxide sodium salt crystal structure.

Platinum group elements (PGEs) are known for their similar chem. properties, which complicates their isolation and separation from mineral ores and recycled products such as autocatalysts. Therefore, this study investigated the separation of PGEs (except Os) in a synthetic autocatalyst mixture using 2-mercaptopyridine N-oxide sodium salt (NaPT) as an extractant. Solvent extraction was performed with an aqueous mixture containing Pt, Pd, Rh, Ir and Ru and NaPT in the presence of toluene, which produced a pink organic layer. An ICP anal. indicated a complete absence of Pd in the orange aqueous layer. The extractions were repeated with different [HCl] and [PT-] and the anal. results confirmed the complete extraction of Pd from the mixture The formation of a Pd(PT)2 complex in the pink product was confirmed with IR, 1H and 13C NMR. Pd(OAc)2 reacted with NaPT in DMF to form pink crystals, which were suitable for crystallog. The pink crystals were also characterized with IR, 1H and 13C and identical to the product isolated after solvent extraction The crystal structure indicated the isolation of the square planar Pd(PT)2·DMF complex, which crystalized in the monoclinic P21/n space group with four mols. per unit cell. The two PT- ligands in the complex bonded with the sulfur atoms (and also the oxygen atoms) cis with respect to each other, with the S-Pd-S and O-Pd-O bond angles at 96.27(5) and 91.08(14)° resp. The two Pd-S bonds distances were 2.2443(13) and 2.2416(15) Å. The selective and complete isolation of Pd from a mixture of PGE using NaPT can be extremely useful in the recovery of Pd from autoctalaysts and other mixed PGE waste materials.

Journal of Molecular Structure published new progress about Crystal structure (of Pd(PT)2 complex). 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, COA of Formula: C5H4NNaOS.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Tyagi, Adish; Karmakar, Gourab; Mandal, B. P.; Dutta Pathak, Dipa; Wadawale, Amey; Kedarnath, G.; Srivastava, A. P.; Jain, Vimal K. published the artcile< Di-tert-butyltin(IV) 2-pyridyl and 4,6-dimethyl-2-pyrimidyl thiolates: versatile single source precursors for the preparation of SnS nanoplatelets as anode material for lithium ion batteries>, Computed Properties of 3811-73-2, the main research area is pyrimidylthiolate tin sulfide nanoplatelet lithium ion battery anode.

New air and moisture stable di-tert-butyltin complexes derived from 2-mercaptopyridine (HSpy), [tBu2Sn(Spy)2], [tBu2Sn(Cl)(Spy)] and 4,6-dimethyl-2-mercaptopyrimidine (HSpymMe2) [tBu2Sn(Cl)(SpymMe2)], have been prepared and utilized as single-source mol. precursors for the preparation of orthorhombic SnS nanoplatelets by a hot injection method and thin films by aerosol assisted chem. vapor deposition (AACVD). The complexes were characterized by NMR (1H, 13C, 119Sn) and elemental anal. and their structures were unambiguously established by the single crystal X-ray diffraction technique. Thermolysis of these complexes in oleylamine (OAm) produced SnS nanoplatelets. The morphologies, elemental compositions, phase purity and crystal structures of the resulting Oam-capped nanoplatelets were determined by electron microscopy (SEM, TEM), energy dispersive X-ray spectroscopy (EDS) and pXRD, while the band gaps of the nanoplatelets were evaluated by diffuse reflectance spectroscopy (DRS) and were blue shifted relative to the bulk material. The morphol. and preferential growth of the nanoplatelets were found to be significantly altered by the nature of the mol. precursor employed. The synthesized SnS nanoplatelets were evaluated for their performance as anode material for lithium ion batteries (LIBs). A cell comprised of an SnS electrode could be cycled for 50 cycles. The rate capability of SnS was investigated at different current densities in the range 0.1 to 0.7 A g-1 which revealed that the initial capacity could be regained.

Dalton Transactions published new progress about Battery anodes. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Computed Properties of 3811-73-2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wang, Junlei; Hou, Baoshan; Xiang, Jun; Chen, Xuedong; Gu, Tingyue; Liu, Hongfang published the artcile< The performance and mechanism of bifunctional biocide sodium pyrithione against sulfate reducing bacteria in X80 carbon steel corrosion>, Quality Control of 3811-73-2, the main research area is sulfate reducing bacteria corrosion carbon steel sodium pyrithione inhibitor.

Anti-bacterial and anti-corrosion properties of sodium pyrithione (SPT) were studied using exptl. methods and quantum chem. calculations SPT at 80 mg/L reduced planktonic and sessile sulfate reducing bacteria (SRB) on X80 carbon steel to undetectable levels. The corrosion inhibition efficiency of SPT against microbiol. influenced corrosion exceeded 80% based on weight loss, which was corroborated by electrochem. data. Mol. modeling showed that SPT mol. provided electrons to the unoccupied orbitals of the Fe surface with a large binding energy of SPT on the Fe (1 1 0) plane, which favored SPT adsorption on the carbon steel.

Corrosion Science published new progress about Adsorption. 3811-73-2 belongs to class pyridine-derivatives, and the molecular formula is C5H4NNaOS, Quality Control of 3811-73-2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem