1-chloro-2,3-epoxypropane appears as a clear colorless liquid with an irritating chloroform-like odor. Density 9.8 lb / gal. Flash point 87°F. Polymerizable. If polymerization takes place inside a closed container, the container is subject to violent rupture. Irritates the skin and respiratory system. Toxic by ingestion. A confirmed carcinogen. Vapors heavier than air. Used to make plastics and as a solvent.
颜色/状态:
Colorless liquid
气味:
Odor is sweet, pungent or chloroform-like ... generally perceived as a slightly irritating chloroformlike odor
蒸汽密度:
3.29 (EPA, 1998) (Relative to Air)
蒸汽压力:
16.4 mm Hg at 25 °C
亨利常数:
Henry's Law constant = 3.0X10-5 atm-cu m/mole at 25 °C (est)
... WISTAR RATS DOSED ORALLY OR IP WITH ... EPICHLOROHYDRIN YIELD ... URINARY METABOLITES ... 2,3-DIHYDROXYPROPYL-S-CYSTEINE & ITS N-ACETATE. SINCE EPICHLOROHYDRIN IS A STRONG ELECTROPHILE THAT IS CAPABLE OF REACTING WITH CELLULAR NUCLEOPHILES, IT IS PROBABLE THAT SOME EPICHLOROHYDRIN METABOLITES ARE ALSO COVALENTLY BOUND TO VARIOUS TISSUE MACROMOLECULES.
Rats given oral (14)C labeled epichlorhydrin and sacrificed after 3 days: 38% exhaled as carbon dioxide; 50% excreted as metabolites in urine; 3% excreted in the feces; and the remainder was found in the tissues - liver, kidney, and forestomach.
The major urinary metabolite of (14)C-epichlorohydrin, after oral administration to rats, was identified previously to be N-acetyl-S-(3-chloro-2-hydroxypropyl)-L-cysteine at 36% of the administered dose. In a similar study reported here, 1,2-dibromo-3- chloropropane was metabolized to at least 20 radioactive urinary metabolites. N-acetyl-S-(3-chloro-2-hydroxypropyl)-L-cysteine was only a minor metabolite (4%) of 1,2-dibromo-3-chloropropane. Epichlorohydrin was metabolized in vitro by rat liver microsomes to alpha-chlorohydrin, but 1,2-dibromo-3-chloroproane was not metabolized to epichlorohydrin or alpha-chlorohydrin under similar conditions. Covalent binding of radioactivity to liver microsomal proteins occurred for both substrates, but was less for (14)C-epichlorohydrin than for (14)C-1,2-dibromo-3-chloropropane. Addition of 3,3,3-trichloropropylene oxide, an inhibitor of epoxide hydrolase, increased the extent of protein binding of epichlorohydrin, but decreased the amojnt of (14)C-1,2-dibromo-3-chloropropane which was bound. The data indicate the epichlorohydrin is not a significant in vivo nor in vitro metabolite of 1,2-dibromo-3-chloropropane in the rat, and is unlikely to be responsible for the toxicity of 1,2-dibromo-3-chloropropane.
In in vitro studies, it was shown that epichlorohydrin was hydrolyzed into 3-chloro-1,2-propanediol by the microsomal epoxide hydrolase(s) (EC 3.3.2.3) of mouse liver in the absence of NADPH, the roles of protein or glutathione in this detoxification being insignificant.
IDENTIFICATION: Epichlorohydrin is a colorless liquid in which the vapor forms explosive mixtures in air. Phosgene, hydrogen chloride and carbon monoxide are liberated while burning. Acids, caustic solutions and halide salts initiate polymerization reactions. The compound is very reactive with metals such as zinc, aluminum, anhydrous metal halides, strong acids and bases along with alcohol containing materials. In the presence of moisture epichlorohydrin is corrosive to steel. Epichlorohydrin has a chloroform like odor. It is soluble in water. Epichlorohydrin is used for the manufacture of glycerine and unmodified epoxyresins. It is also used in the production of elastomers, glycidil ether, cross linked food starch, wet strength resins for the paper industry, water treatment resins, surfactants, ion exchange resins, plasticizers, dyestuffs, pharmaceutical products, emulsifiers, lubricants and adhesives. HUMAN EXPOSURE: On the basis of use patterns and the chemical and physical properties of epichlorohydrin, human exposure is mainly occupational, through vapor inhalation, direct skin contact and a slight exposure resulting from food consumption. Five human volunteers showed significant electroencephalogram changes in the voltage spikes of the alpha rhythm when they were exposed to a vapor of epichlorohydrin. Burning of the eyes and nasal mucosa was reported along with throat irritation. Seven cases of epichlorohydrin spills on the hands, thighs or feet have been described. In two cases epichlorohydrin was mixed with methanol. All spills resulted in protracted chemical burns with a latent period of between 10 minutes and several hours before the first symptoms appeared. Redness, swelling, edema, erosion and ulceration. One case was reported of a 39 year old man who inhaled a few deep breaths of epichlorohydrin vapor occured. Initially only a slight irritation of the eyes and throat was experienced with headache, nausea and vomiting; later chronic asthmatic bronchitis developed. Several biopsies over 2 yr period showed fatty degeneration together with functional disturbances of the liver. ANIMAL/FISH/PLANT/BACTERIAL/ PROTOZOAN/ STUDIES: When the tails of mice were immersed in undiluted epichlorohydrin for 15-60 minutes, most died exhibiting severe systemic poisoning. Within 7 days, 50% of the rabbits died after the application of epichlorohydrin on an occluded patch of shaved skin for 24 hr. Eight hours after oral administration of epichlorohydrin to rats less than 10% of the dose was recovered in the gastrointestinal tract; peak tissue levels occurred approximately 2 hr after dosing in the males and 4 hr in the females. Almost all orally ingested epichlorohydrin was absorbed from the gastrointestinal tract of rats. After absorption by rats, epichlorohydrin was distributed widely through out many tissues. Concentrations of epichlorohydrin found in the blood, 2-4 hr after oral ingestion were subsequently exceeded by a factor of 2 or more in the stomach and intestines, kidneys, prostate and lacrimal glands and the liver. Directly after inhalation, such levels occurred mainly in the epithelium of the nasal turbinates, lacrimal glands, kidneys, liver and large intestine. The following metabolites have been identified in the urine of rats: 2,3-dihydroxypropyl-S-cysteine and its mercapturic acid, beta-chloroacetic acid, oxalic acid and 1,3-bis-mercaptylpropanol-2-ol. Epichlorohydrin is an alkylating agent and has been found to react with nucleic acid bases deoxyguanosine and deoxyadenosine in vitro. After acute intoxication through oral, inhalation or skin exposure death was due to respiratory failure. At lethal doses, histopathological changes were found in the lungs, liver, kidneys, adrenals and thyroid gland of mice and rats. Acute respiratory irritation with hemorrhage and severe edema occurred in rats after inhalation or oral dosing. Rats injected once sc with epichlorohydrin showed nephrotoxic degeneration of the epithelium of the proximal tubules with ischemic cortex necrosis in the first days after exposure. This phase was accompanied by anuria or oliguria then death. Renal insufficiency was noted along with functional disturbances such as proteinuria, increased sodium ion concentration in the urine and an increased potassium ion concentration in the serum. The activity of the enzymes cytochrome c-oxidase, catalase, glutamic pyruvic transaminase and to a lesser extent alkaline phosphatase and glutamic oxaloacetic transaminase was inhibited in renal tissue, while catalase activity was increased in the urine. Regeneration of the kidneys in surviving rats started 5 days after exposure. Slight histological liver changes were also found in mice after 2 hr inhalation exposure to epichlorohydrin which included increased pentobarbital sleeping time in mice and a dose related decrease in histaminases activity in rats. Application of 80% solution epichlorohydrin in cottonseed oil caused corneal damage in the rabbit eye. A 20% solution induced definitive conjunctival and palpebral irritation with edema. Severe skin irritation was seen in a 24 hr occluded patch test on the shaved back of rabbits using a 5% solution of epichlorohydrin in cotton seed oil. Groups of 20 male Wistar rats received epichlorohydrin in water by stomach tube five times a week for 12 weeks. Reduced body weight was noted. From the first week onwards, time and dose related increase was observed in the changes in the basal cell layer of the forestomach such as thickening of the stomach wall, hemorrhaging, hyperplasia and increased number of mitotic figures and nuclei. After 12 weeks some of the rats had papillomas and squamous cell carcinomas. Each group of 30 female ICR/HCA Swiss mice received an ip dose of epichlorohydrin in tricaprylin once a week for up to 450 rats. A group of 100 mice did not receive any treatment and a group of 50 mice received the vehicle only. Papillary tumors were observed in the lungs of 11 exposed mice and 10 vehicle control mice. A group of 40 C3H mice was painted three times a week with a brushful of undiluted epichlorohydrin on the clipped midline of the back for up to 25 months. At month 17, 30 mice were alive and at moth 24 only 1 . No tumors were found. Female rats received orally epichlorohydrin in cotton seed oil between the 6th and 15th day of pregnancy. Higher dose levels were toxic to the dams, no embryotoxic, fetotoxic or teratogenic effects were observed. Similar negative results were obtained when female rats and rabbits inhaled vapors of epichlorohydrin 7 hr/day between the 6th and 15th or the 18th day of pregnancy. Epichlorohydrin is acutely toxic to blue and green algae, bacteria, crustacea and fish.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
致癌性证据
癌症分类:B2组可能的人类致癌物
Cancer Classification: Group B2 Probable Human Carcinogen
CLASSIFICATION: B2; probable human carcinogen. BASIS FOR CLASSIFICATION: Human data are inadequate. Multiple studies in rats and mice administered epichlorohydrin by various routes were positive. As epichlorohydrin is a strong alkylating agent, tumors are produced at the site of application. HUMAN CARCINOGENICITY DATA: Inadequate. ANIMAL CARCINOGENICITY DATA: Sufficient.
Evaluation: There is inadequate evidence in humans for the carcinogenicity of epichlorohydrin. There is sufficient evidence in experimental animals for the carcinogenicity of epichlorohydrin. Overall evaluation: Epichlorohydrin is probably carcinogenic to humans (Group 2A). In making the overall evaluation, the Working Group took into consideration the known chemical reactivity of epichlorohydrin and its direct activity in a wide range of genetic tests.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
致癌性证据
A3:已确认的动物致癌物,对人类的相关性未知。
A3: Confirmed animal carcinogen with unknown relevance to humans.
WITH EXCEPTION OF PANCREAS, A CORRELATION OBSERVED BETWEEN TISSUE DISTRIBUTION & TARGET ORGAN TOXICITY. EXCRETION MAINLY IN URINE. 21 & 18% OF DOSE EXCRETED AS CO2 IN MALE & FEMALE RATS. PEAK TISSUE LEVELS IN FEMALES LOWER.
The upper respiratory tracts of male Fischer F344 rats were surgically isolated and connected to a specially designed flow system. The tracheal connection of the upper respiratory tract and the lower respiratory tract was interrupted. The upper respiratory tract was exposed to propylene-glycol- monomethyl ether, propylene glycol monomethyl ether acetate, epichlorohydrin, cmpd which include vapors while the rat spontaneously breathed from a stream of air. Intact rats were exposed nose only to the same compound and the percentages of vapor absorbed were determined for comparison purposes. Attempts were made to correlate the results with the water solubility of the compounds. The data were compared to predictions of two compartment mathematical models. More than 50 to 70% of the epichlorohydrin, vapors passing through the isolated upper respiratory tacts were absorbed. With the exception of styrene and methylene chloride, the percentage of vapors absorbed by the upper respiratory tract approximated that observed in the lower respiratory tract and nose only exposed animals. There was no correlation between absorption in the URT and water solubility. The mathematical models generally predicted the absorption of vapors by the lower respiratory tract and intact animals accurately. The models seriously underestimated absorption of epichlorohydrin, by the upper respiratory tract. /Results indicate/ that blood air partitioning can account for absorption of chemicals by the upper respiratory tract, but only if other metabolic and physiological parameters are considered.
The highest tissue concentrations in rodents were found in the nose after inhalation, and in the stomach after ingestion. In rats, regardless of the route of exposure, most absorbed epichlorohydrin is metabolized rapidly, part being excreted as carbon dioxide via the lungs and part as water-soluble compounds via the urine.
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
Facile Room-Temperature MgBr<sub>2</sub>· OEt<sub>2</sub>-Catalyzed Thiolysis of Epoxides Under Solvent-Free Conditions
作者:Mohammad M. Mojtahedi、M. Saeed Abaee、Mohammad Bolourtchian、Hassan Abbasi
DOI:10.1080/10426500601088697
日期:2007.2.15
Solvent-free ring opening of 1,2-epoxides with aromatic and aliphatic thiols under 1 mol% magnesium bromide ethyletherate catalysis affords rapid formation of β-hydroxy sulfides at ambient temperature with excellent yields. Nucleophilic attack of the thiols occurs regioselectively at the less hindered position of the epoxides.
Cell adhesion-inhibiting antiinflammatory and immune-suppressive compounds
申请人:Abbott Laboratories
公开号:US20040116518A1
公开(公告)日:2004-06-17
The present invention relates to novel cinnamide compounds that are useful for treating inflammatory and immune diseases and cerebral vasospasm, to pharmaceutical compositions containing these compounds, and to methods of inhibiting inflammation or suppressing immune response in a mammal.
Compositions for Treatment of Cystic Fibrosis and Other Chronic Diseases
申请人:Vertex Pharmaceuticals Incorporated
公开号:US20150231142A1
公开(公告)日:2015-08-20
The present invention relates to pharmaceutical compositions comprising an inhibitor of epithelial sodium channel activity in combination with at least one ABC Transporter modulator compound of Formula A, Formula B, Formula C, or Formula D. The invention also relates to pharmaceutical formulations thereof, and to methods of using such compositions in the treatment of CFTR mediated diseases, particularly cystic fibrosis using the pharmaceutical combination compositions.
Alumina-supported Molybdenum (VI) Oxide: An Efficient and Recyclable Heterogeneous Catalyst for Regioselective Ring Opening of Epoxides with Thiols, Acetic Anhydride, and Alcohols under Solvent-free Conditions
作者:Sweety Singhal、Suman L. Jain、Bir Sain
DOI:10.1246/cl.2008.620
日期:2008.6.5
An efficient and simple protocol for regioselective ring opening of epoxides with thiols, aceticanhydride, and alcohols using 16 wt % MoO3 supported on alumina as a recyclable catalyst is described.
[EN] OXAZOLE DERIVATIVES USEFUL AS INHIBITORS OF FAAH<br/>[FR] DÉRIVÉS D'OXAZOLE UTILES COMME INHIBITEURS DE FAAH
申请人:MERCK & CO INC
公开号:WO2010017079A1
公开(公告)日:2010-02-11
The present invention is directed to certain oxazole derivatives which are useful as inhibitors of Fatty Acid Amide Hydrolase (FAAH). The invention is also concerned with pharmaceutical formulations comprising these compounds as active ingredients and the use of the compounds and their formulations in the treatment of certain disorders, including osteoarthritis, rheumatoid arthritis, diabetic neuropathy, postherpetic neuralgia, skeletomuscular pain, and fibromyalgia, as well as acute pain, migraine, sleep disorder, Alzeimer Disease, and Parkinson's Disease.