大地彩票网注册地址

  • <tr id='fc1t63'><strong id='fc1t63'></strong><small id='fc1t63'></small><button id='fc1t63'></button><li id='fc1t63'><noscript id='fc1t63'><big id='fc1t63'></big><dt id='fc1t63'></dt></noscript></li></tr><ol id='fc1t63'><option id='fc1t63'><table id='fc1t63'><blockquote id='fc1t63'><tbody id='fc1t63'></tbody></blockquote></table></option></ol><u id='fc1t63'></u><kbd id='fc1t63'><kbd id='fc1t63'></kbd></kbd>

    <code id='fc1t63'><strong id='fc1t63'></strong></code>

    <fieldset id='fc1t63'></fieldset>
          <span id='fc1t63'></span>

              <ins id='fc1t63'></ins>
              <acronym id='fc1t63'><em id='fc1t63'></em><td id='fc1t63'><div id='fc1t63'></div></td></acronym><address id='fc1t63'><big id='fc1t63'><big id='fc1t63'></big><legend id='fc1t63'></legend></big></address>

              <i id='fc1t63'><div id='fc1t63'><ins id='fc1t63'></ins></div></i>
              <i id='fc1t63'></i>
            1. <dl id='fc1t63'></dl>
              1. <blockquote id='fc1t63'><q id='fc1t63'><noscript id='fc1t63'></noscript><dt id='fc1t63'></dt></q></blockquote><noframes id='fc1t63'><i id='fc1t63'></i>

                1-萘酚酞

                更新:2018-11-25 10:57:51

                  中文名:1-萘酚酞
                  英文名:1-Naphtholphthalein
                  别名:1-萘酚酞;α-萘酚酞
                  CAS No.:596-01-0级别:Reagent Grade
                  分子式:C28H18O4分子量:418.45
                订购信息
                  货号规格价格品牌
                  16352-1g1g195GBCBIO
                产品介绍


                  化学性质:

                  纯品为无色粉末,但很※难制得。通常含有少量3,3Bis(2hydroxynaphthyl)phthalide的异构体,呈浅红色、浅绿色或红绿色。溶于乙醇、乙醚、甲醇和冰乙酸,微溶于苯,几乎不溶于水。碱溶液∑ 呈蓝色,溶于浓⊙硫酸呈绿色。熔点253~255℃。

                  用途:

                  酸碱指示剂,pH 7.3(无①色至橙色★)~8.7(绿至蓝)。


                更多产品