N-isopropyl-n'-phenyl-p-phenylenediamine appears as dark gray to black flakes or brown-black small chip-like solid with an aromatic odor. (NTP, 1992)
Occupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.
Methemoglobinemia - The presence of increased methemoglobin in the blood; the compound is classified as secondary toxic effect
Skin Sensitizer - An agent that can induce an allergic reaction in the skin.
来源:Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
A study of the prevalence of HLA antigens in persons sensitized to N-isopropyl-N'-phenyl-p-phenylenediamine was conducted to determine if an association between N-isopropyl-N'-phenyl-p-phenylenediamine sensitivity and the gene product of theHLA complex exists. The cohort consisted of 32 Czech patients sensitized to N-isopropyl-N'-phenyl-p-phenylenediamine, as determined by patch tests. The comparisons consisted of 159 persons from the general Slovak population who were unrelated to the patients. Blood samples were collected and serological typing for HLA-A, HLA-B, HLA-C and the HLA-Dw antigens HLA-Dw1, HLA-Dw2, HLA-Dw3, HLA-Dw4, HLA-Dw5, HLA-Dw7, HLA-Dw8, hLA-Dw9, HLA-Dw10, and HLA-Dw11 was performed. The prevalence of HLA-Dw3 in thecohort was significantly elevated relative to the comparisons, 37.5 versus 8.7%.The increased HLA-Dw3 prevalence was associated with a relative risk of 6.3 of developing allergy to N-isopropyl-N'-phenyl-p-phenylenediamine. The prevalence of the HLA-Dw4 antigen was nonsignificantly elevated in the cohort. The prevalence of the other HLA antigens did not differ significantly between the two groups. The authors conclude that allergy to N-isopropyl-N'-phenyl-p-phenylenediamine has a polygenetic background and that genes of theHLA antigen complex are involved.
Urinary excretion of N-isopropyl-N'-phenyl-p-phenylenediamine (101724) (IPPD) was analyzed in 16 press operators exposed to this compound in a rubber curing workshop. A total of 22 urine samples were collected from each worker at the beginning and end of each work day over a 2 week period. ... Rapid excretion of IPPD occurred during the working day, with mean levels of IPPD in urine samples collected before and after shifts of 19.55 and 83.57 micrograms per liter (microg/l), respectively. A total of 4.4 percent of before and 28.7 percent of after shift samples showed no detectable IPPD. A second slow component of excretion was observed during the week, with mean concentrations in before shift samples rising from 10.8 to 25.8microg/l between the beginning and end of the week. In a skin absorption experiment, with one of the authors as subject, one hand was immersed in water containing IPPD for 90 minutes. IPPD levels in the urine were measured at 0, 3, 5, and 10.5 hours after exposure, and were found to be 0, 100, 350, and 570 ug/l, respectively. The excretion rate ceased 7 days after exposure. It was concluded that the kinetics of excretion of IPPD in workers exposed daily to this compound has two different components, an initially rapid one followed by a slow one, and that there are three different components of excretion kinetics after skin absorption with half times of 3, 7, and 24 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
Novel Syntheses of 2,3-Dihydro-1,5-benzothiazepin-4(5H)-ones and 2H-1,4-Benzothiazin-3(4H)-ones
摘要:
Nucleophilic additions of alpha -mercaptoalkanoate esters, and beta -mercaptoalkanoate acids to benzoquinone diimines, followed by cyclization with trifluoroacetic acid or 1,3-dicyclohexylcarbodiimide (DCC), provide novel, high-yielding syntheses of 2H-1,4-benzothiazin-3(4H)-ones (3a-f) and 2,3-dihydro-1,5-benzothiazepin-4(5H)-ones (5a-c), respectively.
RUBBER COMPOSITION, TIRE, BISPHENYLDIAMINE COMPOUND, AND ANTI-AGING AGENT
申请人:OTSUKA CHEMICAL CO., LTD.
公开号:US20170137604A1
公开(公告)日:2017-05-18
Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R
1
, R
2
, R
5
, and R
6
each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R
1
and R
2
do not both simultaneously represent a hydrogen atom and R
5
and R
6
do not both simultaneously represent a hydrogen atom, R
3
and R
4
each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.
[EN] STERICALLY HINDERED AMINE STABILIZERS<br/>[FR] STABILISANTS D'AMINES À ENCOMBREMENT STÉRIQUE
申请人:BASF SE
公开号:WO2010142572A1
公开(公告)日:2010-12-16
The instant invention pertains to hindered amine compounds having at least two nitrogen atoms with different basicity. One part is substituted on the N-atom by alkoxy moieties and the other part is substituted on the N-atom by a hydroxy-alkyl moiety. These materials are particularly effective in stabilizing polymers, especially thermoplastic polyolefins, against the deleterious effects of oxidative, thermal and actinic radiation. The compounds are also particularly effective in stabilizing acid catalyzed and ambient cured coatings systems.
4-Formyl amino-n-methylpiperidine derivatives, the use thereof as stabilisers and organic material stabilised therewith
申请人:——
公开号:US20030083406A1
公开(公告)日:2003-05-01
The present invention relates to 4-formylamino-N-methylpiperidine derivatives of the formula (I)
1
where the variables are as defined in the Description, to a process for preparing these piperidine derivatives, to the use of these piperidine derivatives of the invention, or prepared according to the invention, for stabilizing organic material, in particular for stabilizing plastics or coating materials, and also to the use of these piperidine derivatives of the invention, or prepared according to the invention, as light stabilizers or stabilizers for wood surfaces.
The present invention further relates to stabilized organic material which comprises these piperidine derivatives of the invention or prepared according to the invention.
Compositions are described which comprise
(a) a lubricant, subject to oxidative or thermal degradation, and
(b) at least one compound of formula I
wherein
R⁵, R⁶, R⁷ and R⁸ are independently hydrogen, alkenyl of 3 to 18 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one to three substituents selected from the group consisting of alkyl of 1 to 20 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, -CN, -NO⁶, halogen, -ORψ, -NR¼R½, -SR¾, -COOR| and -CONR⁵⁴R⁵⁵ where Rψ, R¼, R½, R¾, R|, R⁵⁴ and R⁵⁵ are independently hydrogen, alkyl of 1 to 20 carbon atoms, alkenyl of 3 to 18 carbon atoms, aryl of 6 to 10 carbon atoms, cycloalkyl of 5 to 12 carbon atoms or aralkyl of 7 to 15 carbon atoms.
Some of the compounds of formula one are novel.