THE URINARY EXCRETION OF RADIOACTIVE METABOLITES FOLLOWING THE IP ADMIN OF A RANGE OF DOSES OF 2,5-(14)C-2-LABELED N-NITROSOPYRROLIDINE TO RATS WAS EXAMINED. PYRROLIN-2-ONE WAS ONE OF SEVERAL METABOLITES IDENTIFIED.
AN ENZYME SYSTEM RESIDING IN THE SOL FRACTION OF RABBIT LIVER CATALYZES THE CONVERSION OF DELTA 1-PYRROLINE TO GAMMA-AMINOBUTYRIC ACID & ITS LACTAM, 2-PYRROLIDONE.
2-PYRROLIDONE WAS IDENTIFIED AS A METABOLITE OF (14)C-PUTRESCINE IN SLICED RAT LIVER IN VITRO. IT IS ALSO SYNTHESIZED FROM PUTRESCINE BY THE SPLEEN & LUNG, BUT NOT BY KIDNEY, BRAIN, HEART OR MUSCLE.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
暴露途径
这种物质可以通过皮肤被吸收进身体。
The substance can be absorbed into the body through the skin.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
皮肤症状
红色。
Redness.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
眼睛症状
疼痛。红肿。视力模糊。
Pain. Redness. Blurred vision.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
PYRROLIDONE ADMINISTERED BY GASTRIC GAVAGE TO RATS SHOWED LD100, LD50, & MAXIMUM TOLERABLE DOSES OF 10, 7.3 & 4 G/KG, RESPECTIVELY. TOPICAL APPLICATION TO THE EYES OF RABBITS CAUSED IRREVERSIBLE CLOUDING OF THE CORNEA.
The percutaneous absorption has been investigated in rats of a mixture (3:2, w/w) of N-methyl-2-pyrrolidinone and 2-pyrrolidinone, a combination intended for use as a vehicle in the formulation of an antimycotic drug to enhance skin penetration on dermal application, following co-administration of the two (14)C-radiolabelled compounds by the dermal and oral routes. Radioactivity was excreted predominantly in the urine after either route of administration, and comparison of the respective excretion profiles indicated that about three-quarters of the applied dose was absorbed through the skin. Plasma concentrations of each parent compound, as determined by radio-HPLC, reached peak values at 2 hr after oral dosing, and remained relatively uniform during 1-6 hr after application to the skin, suggesting constant percutaneous absorption during this period. N-Methyl-2-pyrrolidinone appeared to be absorbed through the skin more extensively and at a slightly faster rate than 2-pyrrolidinone; total percutaneous absorption tended to be more extensive in female than in male rats. Together, these two 14C-compounds accounted for most of the plasma radioactivity up to 6-8 hr post-administration. However, by 12 hr (when plasma levels were relatively low), most of the radioactivity was associated with unknown polar metabolites. In view of the extensive percutaneous absorption and little first-pass metabolism of the two pyrrolidinones, the oral route was considered to represent a valid alternative to the dermal route for the assessment of the systemic toxicity of the two 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