Tag: M.W=150-200

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. It is a colorless liquid with an odor described as objectionable, and typical of amines. Category: piperidines.

Ding, Dahu;Zhou, Liang;Kang, Fuxing;Yang, Shengjiong;Chen, Rongzhi;Cai, Tianming;Duan, Xiaoguang;Wang, Shaobin research published 《 Synergistic adsorption and oxidation of ciprofloxacin by biochar derived from metal-enriched phytoremediation plants: Experimental and computational insights》, the research content is summarized as follows. Biochar is a promising candidate for the adsorptive removal of organic/inorganic pollutants, yet its role in metal-free catalyzed advanced oxidation processes still remains ambiguous. In this work, five biochar samples (PPBKx, where x represents the pyrolysis temperature) were prepared by using metal-enriched phytoremediation plant residue as the feedstock. Notably, PPBK exhibited a high sp. surface area (as high as 1090.7 m² g^-1) and outstanding adsorption capacity toward ciprofloxacin (CIP, as much as 1.51 ± 0.19 mmol g^-1). By introducing peroxymonosulfate (PMS, 5 mM) as the chem. oxidant, over 2 mmol g^-1 CIP was synergistically adsorbed and oxidized within 30 min although PMS itself could not oxidize CIP efficiently, suggesting the formation of reactive oxidative species. Theor. calculations revealed that PMS anions preferentially adsorbed on the activated C atoms adjacent to the graphitic N dopant, where the carbon matrix served as the electron donor, instead of as an electron mediator. The adsorbed PMS possessed a smaller MO energy gap, indicating that it was much easier to be activated than free PMS anions. Surface-bound reactive species were elucidated to be the dominant contributor through chem. quenching experiments and electrochem. characterizations. The catalytic activity of PPBK700 could be greatly retained in repeated oxidations because of the stable N species, which serve as the active catalytic sites, while the CIP adsorption was greatly deteriorated because of the diminishing active adsorption sites (carbon matrix edge) caused by the partial oxidation of PMS. This work not only provides a facile and low-cost approach for the synthesis of functional biochar toward environmental remediation but also deepens the understanding of biochar-catalyzed PMS activation and nonradical oxidation

2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., Category: piperidines

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Industrially, piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum disulfide catalyst: C5H5N + 3 H2 → C5H10NH. 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. Pyridine can also be reduced to piperidine via a modified Birch reduction using sodium in ethanol. Application In Synthesis of 2403-88-5.

Ding, Haojie;Zhu, Ying;Wu, Yulun;Zhang, Jian;Deng, Huiping;Zheng, Huaili;Liu, Zhen;Zhao, Chun research published 《 In situ regeneration of phenol-saturated activated carbon fiber by an electro-peroxymonosulfate process》, the research content is summarized as follows. Regeneration is required to restore the adsorption performance of activated carbon used as an adsorbent in water purification Conventional thermal and electrochem. regenerations have high energy consumption and poor mineralization of pollutants, resp. In this study, phenol-saturated activated carbon fiber was regenerated in situ using an electro-peroxymonosulfate (E-PMS) process, which mineralized the desorbed contaminants with relatively low energy consumption. The initial adsorbed phenol (81.90%) was mineralized, and only 4.07% of the initial concentration remained in the solution after 6 h of E-PMS regeneration. The phenol degradation was dominated by hydroxyl radical oxidation Adding the PMS in three doses at 2 h intervals improves the regeneration performance from 75% to more than 82%. Regeneration retained 60% of its initial effectiveness even in the 10th cycle with 4.40% of the initial concentration of phenol remaining in the solution These results confirm the E-PMS regeneration process as effective, sustainable, and environmentally friendly for regenerating activated carbon.

Application In Synthesis of 2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., 2403-88-5.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine the name comes from the genus name Piper, which is the Latin word for pepper. 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. Although piperidine is a common organic compound, it is best known as a representative structure element within many pharmaceuticals and alkaloids, such as natural-occurring solenopsins. Formula: C9H19NO.

Dintcheva, Nadka Tz;Al-Malaika, Sahar research published 《 Photo-stabilization of biopolymers-based nanocomposites with UV-modified layered silicates》, the research content is summarized as follows. Eco-friendly in-situ stabilized biopolymer nanocomposites based on polyamide 11 (PA11) and polylactic acid (PLA) were prepared by melt mixing in the presence of a modified organo-montmorillonite clay containing a chem.-bound hindered amine UV-stabilizing function, [(UV)OM-MMt]. Characterization of the newly synthesized organo-modifier containing the reactive hindered amine (HAS) UV-stabilizing function [(UV)OM] has confirmed a successful synthesis. The (UV)OM was then introduced into NaMMt through ion exchange reaction to prepare the UV stabilizer-bound organo-modified-MMt, [(UV)OM-MMt]. The in-situ stabilized PA11- and PLA- nanocomposites (PA11-(UV)OM-MMt and PLA-(UV)OM-MMt) were characterized and their photoxidative stabilities (under accelerated weathering conditions) were compared with their nanocomposite analogs containing either the organo-modified MMt (OM-MMt) alone (i.e. without UV-stabilizer) or the OM-MMT containing conventionally added com. hindered amine HAS-UV-stabilizer (Cyasorb UV-3853). It was found that both of the newly prepared in-situ stabilized PA11- and PLA- nanocomposites gave good clay dispersion and have demonstrated a much higher, especially in PLA-nanocomposites, photo-oxidative stability compared to the corresponding nanocomposites but in the absence, or the presence, of the conventionally added HAS-UV-stabilizer.

2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., Formula: C9H19NO

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine structural motif is present in numerous natural alkaloids. These include piperine, which gives black pepper its spicy taste. This gave the compound its name. 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. Other examples are the fire ant toxin solenopsin, the nicotine analog anabasine of tree tobacco (Nicotiana glauca), lobeline of Indian tobacco. Reference of 2403-88-5.

Dong, Xiaona;Yang, Xiaoxue;Hua, Sheng;Wang, Ziqian;Cai, Tianming;Jiang, Canlan research published 《 Unraveling the mechanisms for persulfate-based remediation of triphenyl phosphate-contaminated soils: Complicated soil constituent effects on the formation and propagation of reactive oxygen species》, the research content is summarized as follows. The continuous accumulation of tri-Ph phosphate (TPHP) in soil poses a potential threat to human health. Persulfate-based advanced oxidation processes (SR-AOPs) are promising soil remediation technologies. Naturally occurring soil constituents could interact with persulfate (PS) during soil remediation by SR-AOPs. However, the production and transformation of reactive oxygen species (ROS) by synthetic reactions between PS and different soil constituents, as well as their roles in the pollutants degradation, are still largely unknown. This study systematically investigated the generation of ROS and their roles in degradation of TPHP in soil constituents activated PS process and in soil constituents-heat (50 °C) co-activated PS process. Comprehensive studies including ROS identification, ESR anal., and ROS-generated model systems were carried out. An appreciable degradation rate of TPHP (∼21.9%) in soil-PS system and the significant discrepancy in degradation rate (69.0-97.0%) in heat-soil-PS systems with three different soils suggested that soil constituents exhibited complex effects on the activation of PS. The Fe/Mn-minerals in soil effectively activated PS and facilitated TPHP degradation Specially, the iron redox cycle (Fe(II) ↔ Fe(III)) plays a key role in ROS generation. Small mol. soil organic matter (SOM) rapidly consumed the produced ROS which led to their mineralization, while the remaining macromol. SOM became more hydrophilic by interaction with ROS. SO•-4, •OH, and 1O2 played major roles directly in TPHP degradation, while O•-2 could not degrade TPHP directly but might promote TPHP degradation by reducing Fe(III)- to Fe(II)-minerals or converting to other ROS. This study provides new and deeper insights into the interaction between PS and soil constituents and their roles in organic pollutant degradation in contaminated soil using SR-AOPs.

Reference of 2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., 2403-88-5.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. It is a colorless liquid with an odor described as objectionable, and typical of amines. HPLC of Formula: 2403-88-5.

Dorival-Garcia, Noemi;Galbiati, Fabrizio;Kruell, Ralf;Kovasy, Roman;Dunne, Simon O.;D’Silva, Kyle;Bones, Jonathan research published 《 Identification of additives in polymers from single-use bioprocessing bags by accelerated solvent extraction and ultra-high performance liquid chromatography coupled with high-resolution mass spectrometry》, the research content is summarized as follows. Single-use technologies are increasingly used in biopharmaceutical manufacturing Despite their advantages, these plastic assemblies draw concern because they are a potential source of contamination due to extractable and leachable compounds (E&Ls). Characterizing E&Ls from such materials is a necessary step in establishing their suitability for use. Therefore, there is an urgent need for sensitive methods to identify and quant. assess compounds in plastic materials. Accelerated solvent extraction (ASE) is a powerful technique that can be reliably used for this purpose. In this study, ASE followed by liquid chromatog. and Orbitrap-based High Resolution Accurate Mass (HRAM) mass anal. was found to be an efficient and versatile method for the determination of additives in different multilayer polymer systems from single-use bags. ASE optimization was performed using a design of experiments approach. The type of solvent, temperature, swelling agent addition, static time and number of cycles were the selected variables. Optimum conditions were dependent on the type of plastic film. Et acetate and cyclohexane were selected individually as optimum solvents. Optimum temperatures were 90-100°C. Pressure was set at 1500 psi and extraction time was 30 min in 2 cycles. Swelling agent addition was necessary with polar extraction solvents. More than 100 additives and degradation products were confidently identified by HRAM MS. Correlations between the type and levels of identified additives and the type of polymer system were established. In addition, degradation behavior and pathways for some additives can be addressed.

2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., HPLC of Formula: 2403-88-5

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. It is a colorless liquid with an odor described as objectionable, and typical of amines. Category: piperidines.

Dou, Jibo;Cheng, Jie;Lu, Zhijiang;Tian, Ziqi;Xu, Jianming;He, Yan research published 《 Biochar co-doped with nitrogen and boron switching the free radical based peroxydisulfate activation into the electron-transfer dominated nonradical process》, the research content is summarized as follows. In this study, N/B co-doped biochars were employed as metal-free activators of peroxydisulfate (PDS) for tetracycline degradation, more importantly, the roles of dopants and the relative contribution of radical vs nonradical oxidations were comprehensively investigated. Integrating with ESR and kinetics calculations, we showed that co-doping N and B into biochars not only boosted the catalytic activity but also switched the radical PDS-activated process into the electron transfer-dominated nonradical process. Compared with pristine biochar/PDS systems (22%), the nonradical contribution of N/B co-doped biochar/PDS systems increased to 59%, exhibiting outstanding stability and selectivity. Galvanic oxidation tests and theor. simulations unveiled that doped biochars as conductive tunnels accelerate the p.d.-driven electron transfer from the HOMO of pollutants to the LUMO of PDS due to the lower energy gap. This study provided new insights into the critical role of heteroatom-doped carbocatalysts in PDS nonradical activation.

Category: piperidines, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., 2403-88-5.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. It is a colorless liquid with an odor described as objectionable, and typical of amines. Synthetic Route of 2403-88-5.

Adil, Sawaira;Kim, Woong Sub;Kim, Tae Hyeong;Lee, Seunghyun;Hong, Seok Won;Kim, Eun-Ju research published 《 Defective, oxygen-functionalized multi-walled carbon nanotubes as an efficient peroxymonosulfate activator for degradation of organic pollutants》, the research content is summarized as follows. Defects and surface O functionalities of multi-walled C nanotubes (MWCNT) prepared by a solid state reaction were demonstrated as effective to activate peroxymonosulfate (PMS) for organic pollutant degradation The catalytic activity of defective, O-functionalized CNT (dCNT) was much better than bare CNT, due to many CNT surface active sites, including structural defects and carbonyl functional groups, and excellent elec. conductivity The effect of several operational factors and water conditions on the degradation rate of targeted pollutants and material stability were comprehensively evaluated for the practical application of the dCNT/PMS integrated process. The dCNT underlying catalytic mechanism is expected to occur by a non-radical pathway and radical-induced oxidation, where surface-bound radicals play a more dominant role than free radicals. A defect and O functional group tuning strategy provided an effective method to develop advanced C catalysts for Fenton-like reactions.

2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., Synthetic Route of 2403-88-5

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. It is a colorless liquid with an odor described as objectionable, and typical of amines. Application In Synthesis of 2403-88-5.

Aiba, Motohiro;Koizumi, Take-aki;Futamura, Michinari;Okamoto, Kazuaki;Yamanaka, Motoshi;Ishigaki, Yuzo;Oda, Mitsuo;Ooka, Chihiro;Tsuruoka, Ayuko;Takahashi, Akira;Otsuka, Hideyuki research published 《 Use of Bis(2,2,6,6-tetramethylpiperidin-1-yl)trisulfide as a Dynamic Covalent Bond for Thermally Healable Cross-Linked Polymer Networks》, the research content is summarized as follows. Dynamic covalent bonds (DCBs), which can undergo reversible cleavage and reformation upon exposure to readily useable stimuli, have attracted dramatic attention, but the library of such bonds still remains to be developed. Herein, we report mol. structures, dynamic behaviors, and healability of bis(2,2,6,6-tetramethylpiperidin-1-yl)trisulfide (BITEMPS-S3) to compare with its disulfide analog (BITEMPS-S2) exchanged at moderate temperature Unsym. cleavage of trisulfide linkage induced relatively rapid disproportionation to di- and tetrasulfide derivatives In the bulk, poly(hexyl methacrylate) networks partially containing the BITEMPS-S3 moiety as a crosslinking point afforded nearly quant. damage healability only by simple hot pressing at 110°C under mild pressure. A slightly higher healability of BITEMPS-S2 compared to that of BITEMPS-S3 would be due to the differences in the chain-transfer reaction for the trisulfide linkage during free-radical polymerization rather than thermal exchangeability of the BITEMPS-S3 moiety. Therefore, not only BITEMPS-S2 but also BITEMPS-S3 should be regarded as one of DCBs triggered upon exposure to mild external stimuli.

2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., Application In Synthesis of 2403-88-5

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Industrially, piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum disulfide catalyst: C5H5N + 3 H2 → C5H10NH. 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. Pyridine can also be reduced to piperidine via a modified Birch reduction using sodium in ethanol. COA of Formula: C9H19NO.

Alvarez-Martin, Alba;George, John;Kaplan, Emily;Osmond, Lauren;Bright, Leah;Newsome, G. Asher;Kaczkowski, Rebecca;Vanmeert, Frederik;Kavich, Gwenaelle;Heald, Susan research published 《 Identifying VOCs in exhibition cases and efflorescence on museum objects exhibited at Smithsonian’s National Museum of the American Indian-New York》, the research content is summarized as follows. Abstract: Two mass spectrometry (MS) methods, solid-phase microextraction gas chromatog. (SPME-GC-MS) and direct anal. in real time (DART-MS), have been explored to investigate widespread efflorescence observed on exhibited objects at the Smithsonian’s National Museum of the American Indian in New York (NMAI-NY). Both methods show great potential, in terms of speed of anal. and level of information, for identifying the organic component of the efflorescence as 2,2,6,6-tetramethyl-4-piperidinol (TMP-ol) emitted by the structural adhesive (Terostat MS 937) used for exhibit case construction. The utility of DART-MS was proven by detecting the presence of TMP-ol in construction materials in a fraction of the time and effort required for SPME-GC-MS anal. In parallel, an unobtrusive SPME sampling strategy was used to detect volatile organic compounds (VOCs) accumulated in the exhibition cases. This sampling technique can be performed by collections and conservation staff at the museum and shipped to an off-site laboratory for anal. This broadens the accessibility of MS techniques to museums without access to instrumentation or inhouse anal. capabilities.

2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., COA of Formula: C9H19NO

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. It is a colorless liquid with an odor described as objectionable, and typical of amines. Safety of 2,2,6,6-Tetramethyl-4-piperidinol.

Asif, Abdul Hannan;Rafique, Nasir;Hirani, Rajan Arjan Kalyan;Wu, Hong;Shi, Lei;Sun, Hongqi research published 《 Heterogeneous activation of peroxymonosulfate by Co-doped Fe₂O₃ nanospheres for degradation of p-hydroxybenzoic acid》, the research content is summarized as follows. Environmental remediation has become more effective when using nanotechnologies. In this study, iron oxide (α-Fe₂O₃) nanospheres with different cobalt doping levels (xCo-Fe₂O₃) were synthesized and applied in the heterogeneous activation of peroxymonosulfate (PMS) for the degradation of p-hydroxybenzoic acid (p-HBA). The catalyst (3Co-Fe₂O₃) with 3% Co doping exhibits the best performance for PMS activation, possibly because of the larger sp. surface area and the tailored catalyst surface as confirmed by XPS. Reaction parameters were investigated to optimize the degradation efficiency. The metal ions leaching tests confirmed the higher stability of the catalyst, thanks to the leaching suppression by the doping of Co²⁺. The main contribution of free radicals (SO•^–₄ and •OH) was confirmed by ESR (EPR) spectra, whereas partial contribution of oxygen anions and singlet oxygen (O•^–₂, ¹O₂) was observed during the quenching tests. Finally, a radical based degradation mechanism was proposed for the removal of p-HBA. It is expected to open up a novel perspective for the application of iron oxide as a potential catalyst for the removal of emerging contaminants.

Safety of 2,2,6,6-Tetramethyl-4-piperidinol, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., 2403-88-5.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem