Re: Color of o-cresolphthalein

On 19 Dec 2005 11:53:01 -0800, mkness21@xxxxxxxxx wrote:

>I want to know if it is worth the expense and trouble of tracking it
>down. I'm looking to make indicator solutions of all different colors.
> I have phenolphthalein (magenta), and thymolphthalein (blue). If I
>could get m-nitrophenol (yellow) then I could make a wide range of
>colors. If o-cresolphthalein is a 'better' red, then I'd have an even
>wider range of colors.
>
>As an individual (i.e. Aldrich won't fill any orders for me!) the last
>2 have not been so easy to find. But I will keep trying.
>
>There isn't any actual objective other than 'fun'.

Any possibility of you connecting up with a chem lab, at a local
college, or perhaps even a high school?? They will vary in how many
indicators they have, but some -- perhaps the older and messier labs,
may have substantial collections.

bob

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