Web价格中心导航 市场价格 企业价格 国际价格 数据导航 数据终端 资讯订阅 点我订阅——>资讯订阅 隆众客服 客服热线：400-658-1688 客服qq号：2305736941 Web一般而言，市面上买来的质量较好的HPLC级别溶剂中，THF含水量为100ppm，甲苯为200ppm，二氯甲烷为20ppm。 以THF为例，如果使用最经典的加入钠丝加热回流除水，以二苯甲酮作为指示剂，煮到指示剂变蓝，收集得到的“超干”THF，含水量是43ppm。
四氢呋喃（THF）行业集中度不高 2024年后下游氨纶需求大幅增长 …
Web这是宁夏美邦寰宇化学有限公司提供的太原THF电话的详细信息，包含太原THF电话等相关介绍,欢迎您及时联系。1.性状：无色易挥发液体，有类似的气味。2.pH值：5（20%水溶液）3.熔点（℃）：-108.54.沸点（℃）：665.相对密度（水=1）：0.896.相对蒸气密度（空气=1）：2.57.饱和蒸气压（kPa）：19.3（20℃）8 ... Web11 Jun 2024 · 四氢呋喃 (thf)是一种无色、可与水混溶、在常温常压下有较小粘稠度的有机液体。 这种环状醚的化学式可写作(ch2)4o。由于它的液态范围很长，所以是一种常用的中等极性非质子性溶剂。它的主要用途是作高分子聚合物的前体。尽管thf的气味和化学性质与乙醚很相似，但是麻醉效果却很差。 nascar driver shooting
2-甲基四氢呋喃 96-47-9 - ChemicalBook
WebBH 3-THF can be used as a reducing agent for the reduction of various functional groups such as carboxylic acids, aldehydes, ketones, esters, acid chlorides, nitriles, epoxides, amides, lactones, oximes, and imines into corresponding alcohols and amines.Grignard reagents, arylmercury, arylthalium, and allyl and propargyllithium compounds react with … Web101 rows · 密度 : 0.887 g/mL at 20 °C: 蒸气密度: 2.5 (vs air) 蒸气压: <0.01 … Tetrahydrofuran (THF), or oxolane, is an organic compound with the formula (CH2)4O. The compound is classified as heterocyclic compound, specifically a cyclic ether. It is a colorless, water-miscible organic liquid with low viscosity. It is mainly used as a precursor to polymers. Being polar and having a wide … See more About 200,000 tonnes of tetrahydrofuran are produced annually. The most widely used industrial process involves the acid-catalyzed dehydration of 1,4-butanediol. Ashland/ISP is one of the biggest producers of this … See more THF is a Lewis base that bonds to a variety of Lewis acids such as I2, phenols, triethylaluminum and bis(hexafluoroacetylacetonato)copper(II). THF has been … See more Tetrahydrofurans The tetrahydrofuran ring is found in diverse natural products including lignans, acetogenins, and polyketide natural products. Diverse … See more • Loudon, G. Mark (2002). Organic Chemistry (4th ed.). New York: Oxford University Press. p. 318. ISBN 9780981519432 See more Polymerization In the presence of strong acids, THF converts to a linear polymer called poly(tetramethylene ether) glycol (PTMEG), also known as … See more THF is a relatively acutely nontoxic solvent, with the median lethal dose (LD50) comparable to that for acetone. However, chronic exposure is suspected of causing cancer. Reflecting its remarkable solvent properties, it penetrates the skin, causing rapid dehydration. … See more • Polytetrahydrofuran • 2-Methyltetrahydrofuran • Trapp mixture • Other cyclic ethers: oxirane (C 2H 4O), oxetane (C 3H 6O), oxane (C 5H 10O) See more melting point of period 3