Dimethyl-p-phenylenediamine is a colorless to reddish-violet solid. Used in the production of methylene blue and photographic developer. Used as a chemical intermediate for dyes and diazonium chloride salts and as an analytical reagent to detect chloroamine in water. (EPA, 1998)
The contribution of the radical cation versus the quinonediimine on redox and addition reactions was studied in human red blood cells exposed to N,N-dimethyl-p-phenylenediamine (99989) (DMPD). A direct reaction occurred between DMPD and oxyhemoglobin under the formation of ferrihemoglobin (methemoglobin) and the N,N-dimethyl-p-phenylenediamine radical cation (DMPP.+). Quinonediimine could not be excluded as the ultimate ferrihemoglobin forming oxidant. Addition of excess DMPD shifted the reaction towards the radical side, increasing ferrihemoglobin formation. This showed that the radical was the responsible oxidant. Reactions with glutathione occurred predominantly with the quinonediimine. In corresponding reactions with N,N,N',N'-tetramethyl-p-phenylenediamine radical cation, the disproportionation reaction of DMPD.+ was very fast. The formation of glutathione disulfide was negligible. Two isomeric glutathione adducts represented the main reaction products. DMPD in human erythrocytes produced many equivalents of ferrihemoglobin, diminished glutathione, and produced both thioethers. DMPD and glutathione disappearance as well as thioether appearance occurred only after a marked lag phase. At increasing concentrations of ferrihemoglobin, higher steady state concentrations of the radical were attained. Preformed ferrihemoglobin in red cells accelerated DMPD and glutathione disappearance significantly; ferrihemoglobin complexing cyanide completely prevented this effect. The authors emphasize the metabolic competency of blood for the biotransformation of aromatic amines.
来源:Hazardous Substances Data Bank (HSDB)
代谢
酚类代谢物和一种亚硝胺在大鼠口服N,N-二甲基-p-苯二胺后在尿液和粪便中被发现。
Phenolic metabolites and a nitrosamine have been found in the urine and the feces following the oral administration of N,N-dimethyl-p-phenylenediamine to rats.
IDENTIFICATION AND USE: N,N-Dimethyl-p-benzenediamine forms colorless needles or reddish-violet crystals. It is used in microscopy, as a reagent in some chemical and biochemical tests, as a base for production of methylene blue, and as a photodeveloper. It is also used in laboratories to screen bacterial culture plates for Neisseria gonorrheae. HUMAN EXPOSURE AND TOXICITY: N,N-Dimethyl-p-benzenediamine is a severe skin irritant. There have been occasional reports of positive patch tests. In human erythrocytes it produced ferrihemoglobin (methemoglobin), diminished glutathione, and thioethers. ANIMAL STUDIES: Studies on the carcinogenic activity of N,N-Dimethyl-p-benzenediamine in rats gave no indications that the substance has carcinogenic potential. The substance was shown to be a severe skin irritant in the rabbit and caused systemic toxicity after absorption through the skin. Subcutaneous injection of N,N-Dimethyl-p-benzenediamine at 25 mg/100 g in rats produced focal necrosis and myofibrillar contracture in skeletal muscles. In the red muscle fibers, band-shaped injury foci accompanied by rapid and intensive plasma cell infiltration was observed. In the white muscle fibers, nodular foci were accompanied by slow, mild plasma cell infiltration. N,N-Dimethyl-p-benzenediamine is not embryotoxic, fetotoxic or teratogenic in rats. It was positive in bacterial mutagenicity assay with Salmonella typhimurium strains TA100 and TA98 with or without activation, and in vitro in CHO cell cytogenetics-sister chromatid exchange assay with or without activation. It was negative in vitro in CHO cell cytogenetics-chromosome aberrations assay with or without activation. Phenolic metabolites and a nitrosamine have been found in the urine and the feces following the oral administration of N,N-Dimethyl-p-benzenediamine to rats.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
副作用
高铁血红蛋白血症 - 血液中高铁血红蛋白含量增加;该化合物被归类为继发性毒性效应。
Methemoglobinemia - The presence of increased methemoglobin in the blood; the compound is classified as secondary toxic effect
来源:Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
毒理性
毒性数据
LCLo(兔子)= 0.5 ppm
LCLo (rabbit) = 0.5 ppm
来源:Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
/SRP:/ Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Aromatic hydrocarbons and related compounds/
/SRP:/ Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal ... . /Aromatic hydrocarbons and related compounds/
1.周国泰,化学危险品安全技术全书,化学工业出版社,1997 2.国家环保局有毒化学品管理办公室、北京化工研究院合编,化学品毒性法规环境数据手册,中国环境科学出版社.1992 3.Canadian Centre for Occupational Health and Safety,CHEMINFO Database.1998 4.Canadian Centre for Occupational Health and Safety, RTECS Database, 1989
Small molecules for treatment of hypercholesterolemia and related diseases
申请人:Sircar C. Jagadish
公开号:US20050277690A1
公开(公告)日:2005-12-15
The present invention provides compositions adapted to enhance reverse cholesterol transport in mammals. The compositions are suitable for oral delivery and useful in the treatment and/or prevention of hypercholesterolemia, atherosclerosis and associated cardiovascular diseases.
coupling and intramolecular amidation of 2-carboxybenzaldehyde and amines. This one-potsynthesis gives excellent yields using ultrathin Pt nanowires as catalysts under 1 bar of hydrogen. These unsupported catalysts can also be used for the synthesis of phthalazinones in high yield when hydrazine or phenyl hydrazine is used instead of amines.
Substituted Indole-2-carboxylates as <i>in Vivo</i> Potent Antagonists Acting as the Strychnine-Insensitive Glycine Binding Site
作者:Romano Di Fabio、Anna M. Capelli、Nadia Conti、Alfredo Cugola、Daniele Donati、Aldo Feriani、Paola Gastaldi、Giovanni Gaviraghi、Cheryl T. Hewkin、Fabrizio Micheli、Andrea Missio、Manolo Mugnaini、Angelo Pecunioso、Anna M. Quaglia、Emiliangelo Ratti、Luciana Rossi、Giovanna Tedesco、David G. Trist、Angelo Reggiani
DOI:10.1021/jm960644a
日期:1997.3.1
strychnine-insensitive glycine bindingsite (noncompetitive inhibition of the binding of [3H]TCP, pA2 = 8.1) displaying nanomolar affinity for the glycine bindingsite (pKi = 8.5), coupled with high glutamate receptor selectivity (> 1000-fold relative to the affinity at the NMDA, AMPA, and kainate bindingsites). This indole derivative inhibited convulsions induced by NMDA in mice, when administered by both
Triphenylstannyl((arylimino)methyl)benzoates with selective potency that induce G1 and G2/M cell cycle arrest and trigger apoptosis <i>via</i> ROS in human cervical cancer cells
作者:Tushar S. Basu Baul、Imliwati Longkumer、Andrew Duthie、Priya Singh、Biplob Koch、M. Fátima C. Guedes da Silva
DOI:10.1039/c7dt04037g
日期:——
Metal complexes with organelle specificity and potent but selective cytotoxicity are highly desirable. A novel series of triphenylstannyl 4-((arylimino)methyl)benzoates (2–8) were obtained by the reactions of triphenylstannyl 4-formylbenzoate [Ph3Sn(L1)] 1 with primary aromatic amines. Two representative compounds (10, 11) were also synthesized by reacting aqua-triphenylstannyl 2-formylbenzoate [Ph3Sn(L9)(H2O)]