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.