午夜福利成人精品视频,国产情侣露脸精品视频,国产成人国产在线播放,久久综合久久狠狠激情,91在线国产精品麻豆,国产精品午夜免费福利,四虎免费在线观看视频,亚洲av激情综合国产,激情五月开心五月麻豆,亚洲激情午夜av在线

  • <tr id="eqequ"></tr>
  • <samp id="eqequ"><pre id="eqequ"></pre></samp>
  • <samp id="eqequ"><tbody id="eqequ"></tbody></samp><kbd id="eqequ"></kbd>
    <samp id="eqequ"><tbody id="eqequ"></tbody></samp>
    
  • <kbd id="eqequ"></kbd>
    Recommended Products
    75-12-7
    123-39-7
    107-31-3
    124-40-3
    75-50-3
    647-45-2
    617-84-5
    74-89-5
    68-12-2
    Products

    Di-methylformamide(DMF)

    Molecular Formula HCON(CH3)2
    Molecular Weight 73.09
    Properties colorless transparent inflammable liquid with slight ammonia odor .m.p.-61°C, b.p.152.8°C, flash point 57.7°C, refractive index 1.427-1.429,density (20°C) 0.9487g/ml,miscible with water,ether,ester,ketone,chlorinated hydrocarbon and benzene hydrocarbon,hygroscopic.
    Uses DMF is an important organic material and good solvent.It is used as solvent for man-made leather and chemical fiber,also used as material for synthesis of insecticide of high-effectiveness and low-toxicity,as gas absorbent to separate and purify the gas in petrochemical industry,as material of sulfadiazine,cortisone and Vitamin B6 in pharmaceutical industry,and also as fixing agent in vapor-phase analysis.
    Packing and storage 200L plastic drums or plastic coated metal pail. Tightly closed to store,prevent from leaking,avoid rain,sunlight,strictly forbid striking and rubbing,far from fire and heat source,stored in cool and ventilating places.
    Specifications Q/320412 XY201-2004 

    Index name

    First grade

    Qualified product

    Appearance

    colorless transparent liquid without visible impurities

    Di-methylformamide(DMF)

    99.8

    99.5

    Methanol mg/kg ≤

    50

    100

    Chroma, (Pt-Co)# : ≤

    5

    10

    Refractive index n25D

    1.427-1.429

     

    Moisture, % ≤

    0.05

    0.10

    Formic acid mg/kg ≤

    30

    50

    Dimethyl amine mg/kg ≤

    15

    30

    PH (20% solution)

    6.5-8.0

    6.5-9.0

    Fe mg/kg ≤

    0.05

    -

    Back

    Copyright(C)2017,Suqian Xinya Technology Co., Ltd. All Rights Reserved. Supported by ChinaChemNet ChemNet Toocle Copyright Notice
    亚洲自在精品网久久一区| 亚洲午夜美女福利一区精品国产| 麻豆激情在线免费观看视频| 久久精品99久久久久久| 日本一区二区高清国产| 岛国精品一区二区蜜桃| 免费人成网站视频在线观看国内| 日本sm/羞辱/调教/捆绑视频| 内射人妻日韩内射人妻| 亚洲最大色视频在线观看| 亚洲精品一区二区三区人妖| 国产精品福利一区二区三区| 国产一区二区不卡精品| 狠狠av一区二区三区| 最新日韩一区二区三区| 99热在线视频这里只有精品| 视频一区二区三区视频| 日本视频在线一区二区三区四区| 蜜桃精品成人影片| 色欲精品国产一区二区三区av| 亚洲av毛片一区二区三区| 啊不要用力操我视频在线| 久久九九视频这里只有精品| 一区二区国产精品精华液| 视频一区二区三区欧美日韩| 亚洲中文字幕不卡一区二区三区| 欧洲美女老熟妇乱子| 亚洲人妻在线一区二区| 国产女人高潮抽搐喷水视频| 成人午夜福利在线观看| 久一有码中文字幕在线| 欧美国产日韩精品77上位| 亚洲专区一区二区在线观看| 国产精品久久久久久aaaa| 亚洲欧美午夜精品丝袜一区二区| 中文字幕亚洲一区二区三区| 午夜亚洲福利在线老司机| 国产网友自拍女在线视频| 国产精品成人自拍视频| 亚洲一区午夜福利美女| 亚洲高清中文字幕综合在线|