Talk:Universal indicator

Text and/or other creative content from Disappearing rainbow indicator was copied or moved into Universal indicator with [permanent diff this edit]. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists.

[Colour range][edit]

Does anyone know exaclty what the ranges of the colors are? EG. blue ~ pH x.xx to y.yy? Thanx 68.39.174.150 01:43, 25 Apr 2005 (UTC)

well i got some (maybe inaccurate) data from a ap chem lab, so...

0-2 is red 3 is peachy 4 is orange 5-7 are yellow 8-9 are greenish yellow 10 is green 11 is blue 12-14 is purple hope this helps, even though it's almost a year too late. M1ss1ontomars2k4 03:01, 16 February 2006 (UTC)[reply]

solution[edit]

Is it a solution or what? It seems like its a mixture or suspension but it really isn't clear. Also, is it the same stuff that is used in ph paper?

Depends- you can make pH paper with pretty much any indicator. When I made a red cabbage indicator, we also soaked paper in it to make indicator paper. However, universal indicator paper is made from UI. -- Dandelions 13:35, 23 July 2006 (UTC)[reply]

poisonous?[edit]

Is it poisonous? If you put three drops in a drink then would it poison you? Thanks =) yes it would...

You're scaring me right now... 212.137.63.86 (talk) 09:52, 21 August 2008 (UTC)[reply]

g[edit]

klk86.132.8.203 18:03, 30 April 2007 (UTC)[reply]

I made technical changes to this 6/30/07. I was uncertain about Wikipedia article formatting. I would like to thank whoever cleaned up my formatting. Is there a writers guide that I should check out?

Universal indicator is a very popular educational tool, and the article is now technically sound. Thanks again to the format editor.

Otis 14:24, 30 June 2007 (UTC) osrothen (AKA Otis)[reply]

Is Aphex Twin relavant as a see also?[edit]

Shouldn't this be changed to a 'This article is about the acidity indicator, for the artist see Aphex Twin'? Jorourke92 (talk) 14:46, 7 February 2008 (UTC)[reply]

Merge[edit]

I merged Disappearing rainbow indicator into this article. I couldn't verify much of the information on the Disappearing rainbow indicator, so not much was preserved. Perhaps some of it was original research, although it seems unusually that a variable mixture could have such definite properties as were described (density, boiling point, vapor pressure). Scientific29 (talk) 21:00, 27 January 2012 (UTC)[reply]

Who is "Yamada"?[edit]

The article mentions a man with the surname Yamada who invented the indicator. I can find plenty of other materials indicating that there indeed was a man named Yamada, but nobody seems to have bothered to attach a first name. The Yamada disambiguation page doesn't have an article for him. --65.128.179.240 (talk) 03:48, 23 April 2013 (UTC)[reply]

His first name (from the patent) appears to be 忍 (Shinobu).

66.234.88.172 (talk) 06:44, 4 April 2023 (UTC)[reply]

External links modified[edit]

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