来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
皮肤症状
红斑。干燥皮肤。
Redness. Dry skin.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
眼睛症状
红斑。疼痛。
Redness. Pain.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
摄入症状
见吸入。
See Inhalation.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
吸收、分配和排泄
三甲基苯(TMB)是一种含有三种同分异构体(假枯烯-1,2,4-TMB;偏三甲苯-1,3,5-TMB;半 mellitene-1,2,3-TMB)的混合物。混合物中个别同分异构体的比例不同。该研究的目的是获得关于三甲基苯及其代谢物在生物流体中的吸收和消除的毒代动力学数据,并探讨暴露生物指标与吸收剂量的关系。在毒理学实验室进行了8小时的吸入试验,对象为8名年龄在20-39岁之间,无TMB暴露史的志愿者。他们分别暴露于浓度为5至150毫克/立方米空气的假枯烯、偏三甲苯或半 mellitene。在暴露前、中、后收集呼出的空气、毛细血管血和尿液样本。使用气相色谱(HP 5890 II Plus,MSD,FID)进行TMB或其代谢物的测定。志愿者的肺通气量在0.56至1.0立方米/小时之间。1,2,4-TMB;1,3,5-TMB;1,2,3-TMB在肺部的保留率分别为68%,67%和71%。TMB从毛细血管血中消失符合开放三室模型。二甲基苯甲酸(DMBA)的尿液排泄符合开放两室模型。基于毒代动力学数据,建立了一个模拟模型,模拟14天内尿液中DMBA的积累和排泄。在24小时间隔内,观察到第5天排泄代谢物的速率最高,尿液中DMBA的量也最高。确定了生物材料中TMB或DMBA水平与TMB空气浓度或吸收剂量的关系。...
Trimethylbenzene (TMB) ... is a mixture of three isomers (pseudocumene-1,2,4-TMB; mesitylene-1,3,5-TMB; hemimellitene-1,2,3-TMB). The proportion of individual isomers in the mixture differs. The aim of this study was to obtain toxicokinetic data on the absorption and elimination of trimethylbenzene and its metabolites in biological fluids and to investigate the relationship between the biological indices of exposure and the absorbed dose. Eight-hour inhalation tests were performed in a toxicological chamber, The subjects were eight volunteers aged 20-39 with no history of exposure to TMB. They were exposed to pseudocumene, mesitylene or hemimellitene at concentrations ranging from 5 to 150 mg/cu m air. Exhaled air, capillary blood and urine samples were collected before, during and after the exposure. The determinations of TMB or its metabolites were performed using gas chromatography (HP 5890 II Plus, MSD, FID). Pulmonary ventilation in the volunteers ranged from 0.56 to 1.0 cu m/hr. The retention of 1,2,4-TMB; 1,3,5-TMB; 1,2,3-TMB in the lungs was 68%, 67% and 71%, respectively. The elimination of TMB from capillary blood occurred in accordance with the open three-compartment model. Urinary excretion of dimethylbenzoic acids (DMBA) proceeded according to the open two-compartment model. Based on the toxicokinetic data, a simulation model of accretion and excretion of DMBA in urine during a 14-day period was developed. The highest rates of metabolite excretion and the highest quantities of DMBA in urine during 24-hr intervals were observed on day 5 of exposure. The relationship between the levels of TMB or DMBA in biological material and TMB air concentration or absorbed dose were determined. ...
The objective of this study was to compare the toxicokinetics of inhaled 1,2,4-trimethylbenzene (1,2,4-TMB) in man after exposure to white spirit with that observed after exposure to 1,2,4-TMB alone. ... The toxicokinetics were studied in 9 male, healthy volunteers exposed to solvent vapors in an exposure chamber for 2 hr during a work load of 50 W. The subjects were exposed to 11 mg/cu m of 1,2,4-TMB on two occasions; during exposure to 1,2,4-TMB vapor alone and during exposure to 300 mg/cu m of white spirit. The 1,2,4-TMB isomer was analyzed in blood and exhaled air by gas chromatography. In addition, a major urinary metabolite of 1,2,4-TMB, 3,4-dimethylhippuric acid (3,4-DMHA), was analyzed by high performance liquid chromatography. ... Blood levels of 1,2,4-TMB and excretion rates of 3,4-DMHA in urine were markedly elevated both during and after exposure to white spirit as compared to exposure to TMB alone. Thus, it appears that components in white spirit inhibit the metabolic elimination of 1,2,4-TMB. This should be considered in biological exposure monitoring as well as in risk assessment. No irritation or central nervous system effects were reported at these conditions.
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
该物质可以通过吸入被身体吸收。
The substance can be absorbed into the body by inhalation.
Tri(1-adamantyl)phosphine: Expanding the Boundary of Electron-Releasing Character Available to Organophosphorus Compounds
作者:Liye Chen、Peng Ren、Brad P. Carrow
DOI:10.1021/jacs.6b03215
日期:2016.5.25
We report here the remarkable properties of PAd3, a crystalline air-stable solid accessible through a scalable SN1 reaction. Spectroscopic data reveal that PAd3, benefiting from the polarizability inherent to large hydrocarbyl groups, exhibits unexpected electron releasing character that exceeds other alkylphosphines and falls within a range dominated by N-heterocyclic carbenes. Dramatic effects in
[EN] TRI-(ADAMANTYL)PHOSPHINES AND APPLICATIONS THEREOF<br/>[FR] TRI-(ADAMANTYL)PHOSPHINES ET LEURS APPLICATIONS
申请人:UNIV PRINCETON
公开号:WO2017075581A1
公开(公告)日:2017-05-04
In one aspect, phosphine compounds comprising three adamantyl moieties (PAd3) and associated synthetic routes are described herein. Each adamantyl moiety may be the same or different. For example, each adamantyl moiety (Ad) attached to the phosphorus atom can be independently selected from the group consisting of adamantane, diamantane, triamantane and derivatives thereof. Transition metal complexes comprising PAd3 ligands are also provided for catalytic synthesis including catalytic cross-coupling reactions.
Lewis Basic Salt-Promoted Organosilane Coupling Reactions with Aromatic Electrophiles
作者:Tyler W. Reidl、Jeffrey S. Bandar
DOI:10.1021/jacs.1c05764
日期:2021.8.11
Lewis basic saltspromote benzyltrimethylsilane coupling with (hetero)aryl nitriles, sulfones, and chlorides as a new route to 1,1-diarylalkanes. This method combines the substrate modularity and selectivity characteristic of cross-coupling with the practicality of a base-promoted protocol. In addition, a Lewis base strategy enables a complementary scope to existing methods, employs stable and easily
The present invention relates to novel formate ester tetralin compounds having fragrant musk-like aroma.
本发明涉及具有芳香麝香般气味的新型甲酸酯四氢萘化合物。
Synthesis of arylbromides from arenes and <i>N</i>-bromosuccinimide (NBS) in acetonitrile — A convenient method for aromatic bromination
作者:Eli Zysman-Colman、Karla Arias、Jay S. Siegel
DOI:10.1139/v08-176
日期:2009.2
Regioselective and chemoselective electrophilic bromination of a wide series of activated arenes using N-bromosuccinimide (NBS) in acetonitrile occurs readily. Environmentally friendly conditions, large substrate scope, and ease of synthesis enhance the utility of this method over other electrophilic bromination conditions.