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Thread: 2 naphtol

  1. #1 2 naphtol 
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    hello everyone
    i have a question
    why the 2-naphtol has to be fresh or cold? and why when we wash it with water, we have to use a little bit of cold water?
    please answer me
    excuse me if i did mistakes in english i'm from france


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    • #2  
      Moderator Moderator Cogito Ergo Sum's Avatar
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      Quote Originally Posted by diala9721 View Post
      hello everyone
      i have a question
      why the 2-naphtol has to be fresh or cold? and why when we wash it with water, we have to use a little bit of cold water?
      please answer me
      excuse me if i did mistakes in english i'm from france

      2-napthol is used for several things, thus it might come in handy if you tell us why you are using it.


      "The only safe rule is to dispute only with those of your acquaintance of whom you know that they possess sufficient intelligence and self-respect not to advance absurdities; to appeal to reason and not to authority, and to listen to reason and yield to it; and, finally, to be willing to accept reason even from an opponent, and to be just enough to bear being proved to be in the wrong."

      ~ Arthur Schopenhauer, The Art of Being Right: 38 Ways to Win an Argument (1831), Stratagem XXXVIII.
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    • #3  
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      ok , we had seperated 2-naphtol from a mixture , so to recrystallize it we had to solve it with a little bit of hot ethanol and then we put some drops of hot water , so after that we filterted it and wash it with a really little bit of cold water.
      i hope i was clear
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    • #4  
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      thank you so much for your help
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    • #5  
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      We're calling this "naphtol", but isn't the base stuff "naphtha"? Is the missing "h" intentional? And, isn't naphtha the old name for benzene? Or benzine, same stuff? And, I always heard, "benzol", and "naphthol", were actually impure mixes of liquid hydrocarbons containing mostly benzene. jocular
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    • #6  
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      Quote Originally Posted by PhDemon View Post
      The spelling with the missing "h" is how they spell it in France. I don't know what the French have against that "h" though. Maybe it's like Americans pronouncing the word "herb" as "'erb". As Eddie Izzard says, "there's a f***ing H in it!"... Naphthol is a 2 ring aromatic ( can be 1- or 2-naphthol depending on where the OH group is) 2-Naphthol - Wikipedia, the free encyclopedia. I'd never heard of benzol but looking it up it is a crude form of benzene obtained from coal tar containing toluene and xylenes as impurities.
      Thank you for this! We always bought "naphtha" at the hardware store to thin paint and clean the brushes, thinking it was benzene, as the drum the store received had "Benzene/Naphtha" as a label. As the years went by, and carcinogenic effects were revealed, it became a priority that benzene be excluded from everything!

      I thought two benzene rings fused together were known as Naphthalene. Moth balls. joc
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