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Author: Subject: Eriochrome black T wanted
CharlieA
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smile.gif posted on 27-4-2016 at 08:28
Eriochrome black T wanted


I would like to get 1 gram of the subject compound (solid). The smallest amount I can find is 10g, which would last me several lifetimes. I can purchase, or maybe trade some EDTA-Na4. You can U2U me or my email is cwamelotti@att.net Thanks
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CharlieA
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sad.gif posted on 9-5-2016 at 15:35


I'm still looking for this chemical. I would like to trade/purchase 0.5-1 gram. I am offering to trade 10-20 grams of Na4EDTA, or will pay US$2 + mailing for 1 gram.
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Loptr
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[*] posted on 9-5-2016 at 16:20


Interesting. What is your intended use? Also, I have seen the EDTA sodium salt around and always wondered what it is used for... Could you enlighten me?

Wait... I was thinking of something else. The eriochrome black t is an indicator, right?

[Edited on 10-5-2016 by Loptr]
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j_sum1
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[*] posted on 9-5-2016 at 16:40


https://en.wikipedia.org/wiki/Eriochrome_Black_T

Cool. I had never heard of complexometric titrations before.

I have all the EDTA I could possibly need -- the disodium salt not the tetra sodium salt. This sounds like an interesting process. If you locate some then I will gladly buy some from you. If we had enough takers, perhaps you could buy the 10g and split it four or five ways.




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Ozone
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[*] posted on 10-5-2016 at 03:48


I prefer calmagite, but both can be found on Ebay:

http://www.ebay.com/itm/HACH-calmagite-analytical-grade-825-...

Eriochrome can be found, too. But, as you say, in rather large lots (10-25g).

O3




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j_sum1
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[*] posted on 10-5-2016 at 04:49


It doesn't seem that expensive. Even if 10 grams is more than you need, it might be worth blowing a few bucks on it.
http://www.ebay.com/itm/261822633244
I was going to suggest sharing a purchase, but by the time you factor in some additional postage between the US and here, there isn't really a lot to be saved.
U2U me if you want to arrange something.




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Mailinmypocket
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[*] posted on 10-5-2016 at 12:32


U2U sent, got quite a bit.



Note to self: Tare the damned flask.
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CharlieA
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[*] posted on 11-5-2016 at 08:59


@Loptr: Sorry for the slow response. I guess you've already discovered that EBT is an indicator used in complexometric titrations of many metals, especially water hardness (Ca+Mg).

@j_sum1: With luck, I may have found 1-2g, which should serve my needs nicely. Where are you located (not in Kansas, USA, I presume)?

@O3: Thanks for the information. I was not aware of that indicator. I've only been out of the loop for 30 years or so, so I have much to relearn and learn.
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Mailinmypocket
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[*] posted on 12-5-2016 at 07:00


Quote: Originally posted by Mailinmypocket  
U2U sent, got quite a bit.


I just finished digging it out of storage and actually have a bit more than I thought. If anyone else wants some send me a U2U.


image.jpeg - 124kB




Note to self: Tare the damned flask.
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Mailinmypocket
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[*] posted on 15-5-2016 at 14:17


Before this goes back in storage. U2U if you want some. $10/first gram including postage US/Canada. $5/g afterwards.

[Edited on 15-5-2016 by Mailinmypocket]




Note to self: Tare the damned flask.
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