4,4'-diaminodiphenylmethane appears as a tan flake or lump solid with a faint fishlike odor. May be toxic by inhalation or ingestion, and may be irritating to skin. Insoluble in water.
颜色/状态:
Crystals from water or benzene
气味:
Faint, amine-like odor
蒸汽密度:
6.8 (NTP, 1992) (Relative to Air)
蒸汽压力:
2.03X10-7 mm Hg at 25 °C
亨利常数:
Henry's Law constant = 5.3X10-11 atm-cu m/mol at 25 °C (est)
大气OH速率常数:
3.00e-11 cm3/molecule*sec
稳定性/保质期:
避免光照,避免与强氧化剂接触。
分解:
When heated to decomposition it emits highly toxic fumes of aniline and NOx.
A sensitive and specific gas chromatographic/mass spectrometric assay is described for the determination of N-acetyl 4,4'-methylene dianiline and N-acetyl 4,4'-methylene-bis(2-chloroaniline) in urine. The method is based on the solvent extraction of the compounds together with deuterium-labeled internal standards, the compounds being separated and detected by capillary gas chromatography/mass spectrometry as their pentafluoropropyl derivatives. The method has been applied to the detection of 4,4'-methylene-bis(2-chloroaniline) and N-acetyl 4,4'-methylene dianiline in the the urine of workers occupationally exposed to 4,4'-methylene-bis(2-chloroaniline) and 4,4'-methylenedianiline. The results show that while N-acetyl 4,4'-methylene-bis(2-chloroaniline) is a relatively minor urinary metabolite a significant proportion of 4,4'-methylenedianiline is excreted as the N-acetylated compound.
Monoacetyl-4,4'- methylenebis-(2-chloraniline) and monoacetyl-4,4'-methylenedianiline were found in urine of workers exposed to 4,4'-methylenebis-(2-chloraniline) and 4,4'-methylenedianiline. Urine samples collected at the end of a shift showed that the concentration of monoacetyl-4,4'-methylenebis-(2-chloroaniline) was less than 5 percent that of 4,4'-methylenebis-(2-chloroaniline); however, urinary concentration of monoacetyl-4,4'-methylenedianiline was between 20 and 160 percent that of 4,4'-methylenedianiline. It was concluded that acetylation reduces the mutagenicity of 4,4'-methylenebis-(2-chloroaniline) and 4,4'-methylenedianiline.
Upon a single i.p. administration of MDA to Sprague-Dawley rats (30 mg/kg bw) at least 17 urinary metabolites were found. Mainly, the following acetylated metabolites have been identified: N-acetyl-MDA, N,N-diacetyl-MDA, N,N-diacetyl-3-hydroxy-MDA, N-acetyl-4,4'-diaminobenzophenone, and N,N-diacetyl-4,4'-diamino-benzhydrol.
/Researchers/ investigated the formation of stable urinary metabolites in post-shift urine from 63 workers exposed to MIDA. MDA, N-acetyl-MDA (MAMIDA) and N,N'-diacetyl-MDA (DAMDA) were determined in non-hydrolyzed urine samples, and that of total MDA on urine samples after alkaline hydrolysis. Their relative concentrations (arithmetic means) were found to be in the following order: total MDA /greater than/ MAMDA /greater than/ MDA /greater than/ DAMDA. While MAMDA represented more than 50% of total MDA, MDA and DAMDA were lower than 15% and 3% respectively. Acetylation of MDA, described as a possible way of detoxification, is confirmed to be an important metabolism route in humans, essentially through the monoacetylated metabolite. However, the individual ratio MAMDA/total MDA was found to vary widely (roughly from 0% to 100%). The half-life was found to be between 9 and 14 hours.
After 4,4'-Methylenedianiline enters to our body, it is transported in the blood or stored in tissues. The N-N-acetylation of the compound leads to the formation of some toxic derivatives. The liver and thyroid are the targets of 4,4'-methylenedianiline in animals.
No data are available in humans. Sufficient evidence of carcinogenicity in animals. OVERALL EVALUATION: Group 2B: The agent is possibly carcinogenic to humans.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
致癌性证据
A3; 对动物已确认的致癌物,对人类的相关性未知。/4,4-亚甲基二苯胺/
A3; Confirmed animal carcinogen with unknown relevance to humans. /4,4-Methylene dianiline/
来源:Hazardous Substances Data Bank (HSDB)
毒理性
致癌性证据
4,4'-亚甲基二苯胺:合理预期为人类致癌物。
4,4'-Methylenedianiline: reasonably anticipated to be a human carcinogen.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
致癌物分类
国际癌症研究机构致癌物:4,4'-亚甲基二苯胺
IARC Carcinogenic Agent:4,4'-Methylenedianiline
来源:International Agency for Research on Cancer (IARC)
... Male rats, guinea pigs and monkeys /were/ treated topically with a low (2 mg/kg bw) or high (20 mg/kg bw) dose of 14C-MDA. In rats, 43% and 10% of the low dose was recovered in urine and feces during a 96 hours period; 2% remained in tissues and skin washing removed 25% of dose. The remainder (26%) was recovered by skin extraction and solubilisation. The percentage of dose absorbed decreased by increasing the dose, but the total amount absorbed (approx. 0.225 mg/rat) was similar after both doses. In guinea pigs, 10% and 18% of the low dose was excreted in urine and feces; 1% was recovered in tissue, 41% in the skin wash and 29% from the application area. The percent of dose absorbed decreased following the high dose, but the amounts absorbed (in mg/animal) doubled.
... The percutaneous absorption of MDA /was invesitgated using/ ... full-thickness rat and human skin in vitro. In this study MDA was topically applied (17.7 - 40.6 ug/sq cm in ethanol) to unoccluded skin, using a flow-through diffusion cell. After 72 hours the absorption into the receptor fluid reached 6.1 +/- 2.0% for rat skin and 13.0 +/- 4.3% for human skin related to applied dose. When the skin was occluded, the absorption of MDA was significantly enhanced reaching approx. 13.3% and 33% for rat and human skin, respectively. At the end of each experiment, considerable residual material remained with the skin (about 23-58%).
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
MDA通过皮肤以及胃肠道被吸收。
MDA is absorbed via skin as well as from the gastrointestinal tract.
The disposition of MDA was also examined following iv administration. In rats, 67% and 31% of the low dose (2 mg/kg bw) was recovered in urine and feces by 96 hr after dosing. In monkeys, the radioactivity occurred primarily in the urine (85%) by 168 hr after dosing (2 mg/kg bw). In guinea pigs, however, 35% and 57% of the dose were eliminated in urine and feces, respectively, during 96 hours.
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
Simple synthetic route to soluble polyimides via nitro‐displacement reaction and their second‐order nonlinear optical properties
作者:Yeong‐Beom Lee、Han Young Woo、Chong‐Bok Yoon、Hong‐Ku Shim
DOI:10.1039/a902230i
日期:——
Nonlinear optical (NLO) functionalized polyimides were directly synthesized using the nitro-displacement reaction between an alkanediol monomer and a diimide monomer without a thermal curing step. The polyimides were soluble in aprotic polar solvents such as DMSO, DMAc, DMF and NMP, and showed glass transitions at temperatures between 172 and 198 °C. We observed good thermal stability up to around 300 °C (at 5% weight loss) for the polymers. The weight average molecular weights of the resulting polymers were determined to be 10 400–15 100 (M
w
/M
n
= 1.84–2.00). The poled polymer films showed good nonlinearity (d
33
= 76 pm V
–1
) in the Maker fringe method for the second harmonic generation (SHG).
The present invention concerns novel compounds, their preparation and their uses, therapeutic uses in particular. More specifically it concerns derivative compounds having at least two aromatic cycles, their preparation and their uses, in particular in the area of human or animal health. These compounds have an affinity for the biological receptors of neuropeptide Y, NPY, present in the central and peripheral nervous systems. The compounds of the invention are preferably NPY antagonists, and more particularly antagonists of sub-type NPY Y1, and can therefore be used for the therapeutic or prophylactic treatment of any disorder involving NPY. The present invention also concerns pharmaceutical compositions containing said compounds, their preparation and their uses, as well as treatment methods using said compounds.
Diamine Compound Having Phosphorylcholine Group, Polymer Thereof, and Process for Producing the Polymer
申请人:Nagase Yu
公开号:US20100036081A1
公开(公告)日:2010-02-11
Highly polymerizable diamine compounds having a phosphorylcholine group are disclosed. High-molecular weight polymers are obtained from the highly polymerizable diamine compound having a phosphorylcholine group as a monomer, and the polymers have improved mechanical strength, water resistance and heat resistance while maintaining excellent biocompatibility and processability of MPC polymers. Processes for producing the polymers are disclosed. The diamine compounds having a phosphorylcholine group are represented by Formula (I). The polymers contain at least 1 mol % of a specific structural unit with a phosphorylcholine group represented by Formula (II) and have a number average molecular weight of not less than 5,000. In the processes, the diamine compound is used as a monomer.
Hydrogenation of arenes, nitroarenes, and alkenes catalyzed by rhodium nanoparticles supported on natural nanozeolite clinoptilolite
作者:Seyed Meysam Baghbanian、Maryam Farhang、Seyed Mohammad Vahdat、Mahmood Tajbakhsh
DOI:10.1016/j.molcata.2015.06.029
日期:2015.10
Nanozeolite clinoptilolite supported rhodiumnanoparticles (Rh/NZ-CP) has been prepared and characterized by a variety of techniques, including XRD, BET, TEM, EDX, ICP-OES and XPS analysis. This nanomaterial contains 2 wt% Rh in the range of 5–20 nm metallic nanoparticles distributed on nanozeolite. The catalytic performance of Rh/NZ-CP was evaluated by the hydrogenation of arenes, nitroarenes, and alkenes under
Synthesis and Aggregation Properties of Two- and Three-Armed Nitrogen-Rich Chelate Ligands: Novel Bis(N-acylamidines), Tris(N-acylamidines) and Bis(triazapentadienes) with Flexible or Rigid Spacers
and three-armed ligands, like bis(N-acylamidines) 7 and 9, tris(N-acylamidines) 8 and bis(1,3,5-triazapenta-1,3-dienes) 10 with different spacers between the ligand moieties, have been easily prepared in moderate-to-good yields starting from diamines, triamines or dicarboxylic acid derivatives. Thus, the reaction of diamines and triamines with N-acylimidates 3 led to bis(N-acylamidines) 7 and tris(N-acylamidines)