MES 分子生物学用

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H315：皮膚刺激

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

• 注意書き

  P261：粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。

  P264：取扱い後は皮膚をよく洗うこと。

  P264：取扱い後は手や顔をよく洗うこと。

  P304+P340：吸入した場合：空気の新鮮な場所に移し、呼吸しやすい 姿勢で休息させること。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

  P321：特別な処置が必要である（このラベルの．．． を見よ）。

  P332+P313：皮膚刺激が生じた場合：医師の診断/手当てを受けるこ と。

  P337+P313：眼の刺激が続く場合：医師の診断/手当てを受けること。

  P405：施錠して保管すること。

MES 分子生物学用 価格

MES 分子生物学用 化学特性,用途語,生産方法

• 外観

  白色結晶性粉末

• 溶解性

  水には溶ける(10.66g/50ml水)。TES、HEPESに比較すれば溶解度は小さく、0℃において0.65mol/lで飽和する。有機溶媒には溶けない。

• 解説

  タイラー標準ふるいにおけるふるいの目の大きさを示す単位．目開き0.0029 in(1 in＝2.54 cm)，針金径0.0021 inの200メッシュ(1 in中の目の数に相当)ふるいを基準にし，ふるい比(隣り合うふるいの目開きの比)を1：⁴√2として標準ふるいが定められている．わが国の単位はJIS Z8801(標準ふるい)に準処し，また日本薬局方もほぼこれに準じており，メッシュ単位は使用しない．

• 説明

  MES Monohydrate is a zwitterionic buffer that is not absorbed through cell membranes and is virtually transparent in UV light. MES is a buffering agent used in many biological and biochemical applications. It is also used as a running buffer for denaturing gel electrophoresis. The characteristics of low UV absorptivity, minimal reactivity, stable pH and solubility in water allow MES Monohydrate to be used as a Good's buffer.

• 化学的特性

  white crystalline powder

• 使用

  MES monohydrate is a buffering agent used in biochemistry and molecular biology that was selected and described by Good et al. It is a zwitterionic, morpholinic buffer that is useful for a pH range of 5.5 – 6.7 and commonly used for cell culture media, as a running buffer in electrophoresis, and for protein purification in chromatography. MES lacks the ability to form a complex with most metal ions and is recommended for use as a non-coordinating buffer in solutions with metal ions. MES is often used in buffered culture media for bacteria, yeast, and mammalian cells. It is toxic towards plants at high concentrations, but can be used in culture media at lower concentrations for plants. Due to low ionic mobility, MES is regarded as an excellent buffer for use in capillary electrochromatography. MES is often employed as a substitute for the highly toxic cacodylate, as well as a substitute for the non-zwitterionic buffers citrate and malate. MES complexes with some organotin(IV) molecules that are being explored as antitumor agents.
  MES free acid or MES free acid monohydrate can be mixed with MES sodium salt to acquire desired pH. Alternatively, MES free acid or MES free acid monohydrate can be titrated with sodium hydroxide to attain desired pH.

• 主な応用

  MES is one of the "Good" buffers developed for biological applications. MES is not recommended at pH 7.4; other buffers should be considered. All qualities are tested for trace ions and all can be used for biological and biochemistry applications. This product is used in biochemical and biological techniques where highly purified products are needed.
  MES Monohydrate has been used:
  To adjust the pH of growth medium to 5.5-7.0 in an in vitro cell wall stress assay.
  As a buffering agent to stabilize enzymatic solutions.
  As a component of PAGE running buffer.

• 一般的な説明

  buffer substance MES

• 予防処置

  Solubility/Stability: MES is soluble in water, giving a clear colourless solution at concentrations of 0.5M or higher. The pH of a solution should be between 2.5 and 5, depending on the concentration. Solutions are stable at 2-8°C for months.
  Sterilization: Sterilization should be by filteration through 0.2μM filters. Autoclaving is not recommended by any sulfonic acid buffers. If buffers must be nuclease-free, it is best to treat the water, then add the buffer solids after autoclaving. When MES solutions are autoclaved, they turn yellow (although pH does not change measurably. The identity of the yellow breakdown product is unkown.

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