欧美色亚洲色,欧美日韩国产亚洲成人自拍,中文字幕人妻一区二区在线视频侦探,熟女一区二区少妇

你好,歡迎訪問濟(jì)南金昊化工有限公司!

專注品質(zhì),信賴服務(wù)

我們用心做產(chǎn)品服務(wù)

咨詢熱線:

13655318786

常見問題

您現(xiàn)在的位置: 網(wǎng)站首頁>>新聞中心>>常見問題二氯甲烷是什么?

二氯甲烷是什么?

來源:http://m9660.cn/ 日期:2022-07-20 發(fā)布人: 瀏覽次數(shù):0
二氯甲烷簡稱DCM,化學(xué)式CH2CL2,常溫下是一種無色透明、比水重、易揮發(fā)的液體,微溶于水,與絕大多數(shù)常用的有機(jī)溶劑互溶,具有類似醚的刺激性氣味。二氯甲烷沸點(diǎn)低,在工業(yè)時(shí)容易揮發(fā)造成環(huán)境污染。
Dichloromethane, abbreviated as DCM, with chemical formula CH2Cl2, is a colorless, transparent, water-specific, volatile liquid at room temperature. It is slightly soluble in water and miscible with most commonly used organic solvents. It has a pungent smell similar to ether. Dichloromethane has a low boiling point and is easy to volatilize in industrial production, causing environmental pollution.
由于溶解能力強(qiáng)、沸點(diǎn)低、相對低毒性和反應(yīng)惰性,長期以來一直是多種應(yīng)用的首*溶劑。
Due to its strong solubility, low boiling point, relatively low toxicity and inert reaction, it has been the first solvent for many applications for a long time.
例如在制藥工業(yè)中作為反應(yīng)介質(zhì),用于制備氨芐青霉素、羥芐青霉素和先鋒霉素等;
For example, as a reaction medium in the pharmaceutical industry, it is used to prepare ampicillin, hydroxybenzylpenicillin and vancomycin;
也用于膠片中的溶劑;還可用作石油脫蠟溶劑、氣溶膠推進(jìn)劑、有機(jī)合成萃取劑、聚氨酯等泡沫塑料用發(fā)泡劑和金屬清洗劑等。
Also used as solvent in film production; It can also be used as oil dewaxing solvent, aerosol propellant, organic synthetic extractant, foaming agent for foam plastic production such as polyurethane and metal cleaning agent.
二氯甲烷在我國主要用于膠片的消費(fèi)量占總消費(fèi)量的50%,醫(yī)藥方面占總消費(fèi)量的20%,清洗劑及化工行業(yè)消費(fèi)量占總消費(fèi)量的20%,其他方面占10%。
The consumption of dichloromethane mainly used in film production accounts for 50% of the total consumption in China, medicine accounts for 20% of the total consumption, cleaning agent and chemical industry accounts for 20% of the total consumption, and other aspects account for 10%.
工業(yè)上二氯甲烷一般使用天然氣和氯氣反應(yīng)制得,是一種優(yōu)良的有機(jī)溶劑,經(jīng)常用來代替易燃品(如石油醚和乙醚)。此外,由于毒性很小,且中毒后蘇醒較快,故可用作麻醉劑。
In industry, dichloromethane is generally prepared by the reaction of natural gas and chlorine. It is an excellent organic solvent and is often used to replace inflammables (such as petroleum ether and ether). In addition, it can be used as an anesthetic because of its low toxicity and rapid recovery after poisoning.
以上就是為大家介紹的有關(guān)過硫酸鈉的詳細(xì)的介紹,希望對您有所幫助.如果您有什么疑問的話,歡迎聯(lián)系我們.我們將以的態(tài)度,為您提供服務(wù)http://m9660.cn
The above is a detailed introduction about sodium persulfate for you. I hope it will help you. If you have any questions, please contact us. We will provide services for you with a professional attitude http://m9660.cn

相關(guān)新聞
日本乱人片一区二区三区| 91人妻俱乐部| 国产精品久久久久久之……| 国产淫骚女主播直播| 国产午夜美女精品自拍| 看个黄色香蕉片香蕉片| 91国产精品一二三| 97在线视频精品| 日韩无码中文字幕国产首次| 操河南熟女视频| 中文偷拍AV在线| 亚洲午夜久久久精品影院| 精品久久久久AV影院| 久久瑟| 天天性AV| 夜夜嗨av无码国产色综合| 啪啪啪激情国产| 亚洲伦理视频一二三| 好吊妞免费高清在线视频| 无码AⅤ天堂| 五月丁香一级A片视频| 中国少妇一级黄色片一| 婷婷干综合| 国产91 A V视频| 熟女国产五十路熟妇| 亚洲一本道在线观看| 日韩欧美乱码八区| 欧美福利视屏在线观看| 欧美久久成人整片| 成人精品福利在线| 好吊妞视频一区二区三区| 在线资源国产欧美精品| 国产高清在线观看视频三级| 日本免费A级高清岛国在线| 欧美日本人妻精品| 欧美视频图片一区二区三区| 国内偷拍久久| 欧美看B B视频| 自拍偷拍熟女日韩| 亚洲 无码3| 天天激情视频网站|