91蝌蚪视频在线观看,国产农村乱人伦精品视频,亚洲无码精彩视频在线观看,日日摸夜夜漆夜夜添无码专区,亚洲无码熟妇人妻AV在线,国产精品极品美女自在线观看免费,婷婷成人综合激情在线视频播放,美女视频黄频a免费高清不卡,国产精品夜夜嗨视频免费视频,亚洲无码不卡网

<fieldset id="seooo"></fieldset>
<fieldset id="seooo"><menu id="seooo"></menu></fieldset>
  • <strike id="seooo"></strike>
  • <strike id="seooo"></strike>
    • <del id="seooo"><tfoot id="seooo"></tfoot></del>

      Welcome to Shanghai Yixiang Chemical Co., Ltd technology website, 0086-532-66721921

      SERVICE HOTLINE:

      0086-532-66721921

      Shanghai Yixiang Chemical Co., Ltd

      QQ:3572534783

      Tel:0086-532-66721921

      E-mail:market@yx-pvp.com

      Add:Room J3681, No. 500, Xincheng Road,

      Jiading District, Shanghai,China

      Solvent Properties and Applications of 2-Pyrrolidone

      Release Date:2022-11-01

      2-Pyrrolidone

      2-pyrrolidinone, English name 2-pyrrolidinone, CAS No. 616-45-5, is colorless to yellowish liquid or crystal.

      2-pyrrolidone forms metal salts with alkali metals, alkoxy metals or alkaline hydroxides. It can be hydrolyzed to 4-aminobutyric acid in the presence of strong acid. It reacts with acetic anhydride to form N-acetylpyrrolidone. N-hydroxymethyl-2-pyrrolidone was obtained by reacting with paraformaldehyde under the catalysis of alkali.

      In terms of solubility, 2-pyrrolidone can be mixed with water, alcohol and ether. Most of the light damages, such as benzene, ethyl acetate and carbon disulfide, are miscible and difficult to dissolve in petroleum ether.

      2-pyrrolidone is used as a solvent for synthetic resin, plasticizer, polymerization agent, printing ink, insecticide, pesticide, polyol, iodine, etc. It is also an organic synthesis intermediate, which is used as a raw material for the manufacture of nylon 4, polyvinylpyrrolidone, nylon 4 and piracetam.


      Online Service
      Contact us

      Hot Tel

      0086-532-66721921

      Work Shift

      from Monday to Friday

      QR code
      Service
      久久99精品久久久久久噜噜| 麻豆成年视频在线观看| 日韩精品人妻中文字幕| 亚洲人成网站免费播放| 2020国产精品久久精品| 国产在线观看精品一区二区三区| 精品一区二区三区在线播放视频| 国产日韩欧美一区二区三区在线| 国产成人啪精品午夜网站| 岛国中文字幕一区二区| 又紧又大又爽精品一区二区| 亚洲日韩AV无码中文字幕美国| 国产午夜人做人免费视频| 亚洲无码久久久久| 自拍偷自拍亚洲精品牛影院| 国产毛片一区二区日韩| 又大又黄又粗高潮免费| 永久免费av网站可以直接看的| 一级一级一片免费| 伊是香蕉大人免费一区| 成年短视频在线观看免费| 动漫精品中文字幕无码| 欧美精品亚洲日韩a| 中文字幕乱码一区二区免费| 在线网站18禁| 国产成人A在线观看网站站| 国产理论最新国产精品视频| 日日摸夜夜添狠狠添欧美| 狠狠色狠狠综合久久| 少妇av免费在线播放| 久久99精品国产精品| 欧美激情视频一区| 久久亚洲中文字幕不卡一二区| 中文无码熟妇人妻AV在线| 欧美乱妇日本无乱码特黄大片| 国产精品自拍三级视频| 亚洲人视频在线观看| 亚洲成人福利网站| 青青青亚洲精品国产| 亚洲欧美另类久久久精品播放的| 日本在线有码中文字幕|