3-ニトロベンズアルデヒド

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

  H302：飲み込むと有害

  H411：長期的影響により水生生物に毒性

• 注意書き

  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。

  P270：この製品を使用する時に、飲食または喫煙をしないこ と。

  P273：環境への放出を避けること。

  P301+P312：飲み込んだ場合：気分が悪い時は医師に連絡する こと。

  P391：漏出物を回収すること。

  P501：内容物/容器を．．．に廃棄すること。

3-ニトロベンズアルデヒド 価格

MSDS Information

• 3-Nitrobenzaldehyde

3-ニトロベンズアルデヒド 化学特性,用途語,生産方法

• 外観

  わずかにうすい黄色～黄褐色又は緑黄色、結晶性粉末～粉末又は塊

• 溶解性

  水に難溶。殆どの有機溶剤に可溶。エタノールに溶け、水に溶け難い。

• 使用上の注意

  アルゴン封入

• 説明

  3-Nitrobenzaldehyde, meta-nitrobenzaldehyde or m-nitrobenzaldehyde is an organic aromatic compound containing a nitro group meta-substituted to an aldehyde. 3-Nitrobenzaldehyde is the primary product obtained via the mono-nitration of benzaldehyde with nitric acid.

• 化学的特性

  yellowish to yellow-brown granular powder

• 使用

  3-Nitrobenzaldehyde is a benzaldhyde with a nitro group in the meta position.

• 製造方法

  89 mL (1.7 mol) concentrated H2SO4 are filled in a 500 mL three-neck flask equipped with an internal thermometer and an addition funnel with pressure balance. Whilst cooling with an ice bath 45 mL (0.95 mol) fuming HNO3 are added carefully under stirring, the temperature must not exceed 10 °C. To this nitrating acid, 10.6 g (10.2 mL, 100 mmol) benzaldehyde are added under further cooling so that the temperature can be constantly kept at 15 °C (about 1 hour). The ice bath is removed and the reaction mixture is stored over night at room temperature.
  The reaction mixture is poured in a 1 L beaker on 500 g crunched ice, the yellow precipitation is sucked off at 16 hPa over a Buechner funnel and washed with 200 mL of cold water. Crude yield (humid): 14.4 g
  The humid crude product is dissolved in 125 mL tert-butyl methyl ether and then shaken out with 125 mL of a 5% NaHCO3 solution. The organic phase is dried over sodium sulfate, filtered and the solvent evaporated at a rotary evaporator. The residue is recrystallized from toluene / petroleumether (60-80 °C) by dissolving it in toluene whilst heating and then adding the double amount of petroleum ether in portions under ice cooling. The crystalllized light yellow 3-nitrobenzaldehyde is sucked off over a Buechner funnel. The product is dried over silica gel in an evacuated desiccator.
  Yield: 8.0 g (53 mmol, 53%); mp 56 °C

• 純化方法

  Crystallise the aldehyde from water or EtOH/water, then sublime it twice at 2mm pressure at a temperature slightly above its melting point. [Beilstein 7 IV 591.]

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