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
    少妇美女18p一区二区三区| 日韩性插视频在线观看| 亚洲伊人超碰在线国产| 日本在线人妻一区二区| 国内激情一区二区三区| 欧美午夜福利天堂在线观看| 98伦理大香蕉内射人妻| 欧美日韩国产亚洲另类| 精品99成人午夜在线| 99久久精品国产99久久婷婷| 日韩国产乱码中文字幕| 亚洲一区精品在线国产| 国产精品高清一区二区| 成人亚洲一区二区三区在线观看| 五十六十日本老熟妇牲| 不要内射进去网站视频| 日本一区二区三在线观看| 少妇厨房愉情理伦片视频在线观看| 日韩成人动漫在线视频| 桃色国产熟女精品视频| 日本一区三区高清视频| 亚洲国产成人久久综合一区| 国产老妇伦国产熟女老妇高清| 亚洲精品中文字幕无码AV| 国产一区二区三区特区| 国精产品自偷自偷综合下载| 玩弄丰满少妇xxxxx性多毛| 国产伦精品一区二区三| 男女激情久久久国产| 两女女百合互慰av赤裸无遮挡| 亚洲午夜激情免费试看| 亚洲精品黄色在线观看| 日韩精品一二三黄色一级| 久久婷婷国产综合精品| 久久夜色精品久久噜噜亚洲av| 精品一区二区三区黑人| 61精品人妻一区二区三区| 亚洲国产精品日本视频| 婷婷四房综合激情五月在线| 久久国产劲爆内射日本| 亚洲国产精品一区二区在线观看|