Hi, can someone help me to find a company that supplies Na2EGTA ( di-sodium EGTA). It seems to be a common chemical but I am unable to find in Sigma.
Please share link if u have.
Any help will be appreciated.
Hi, Indeed it is not trivial task. Disodium salt of EDTA is very common, however EGTA is sold as an acid or 0.5 M solution (pH= 8), for example in VWR, however it think it is tetrasodium salt solution already.
https://us.vwr.com/store/product/10070758/egta-ethylene-glycol-bis-2-aminoethyl-ether-n-n-n-n-tetraacetic-acid-0-5m-in-aqueous-solution-autoclaved-ph-8-0
Try to find product here by asking vendor directly:
http://www.bocsci.com/description.asp?cas=26082-78-0
I think another easy way is to perform this agent manually (in solution) by simple chemical reaction. Take two molar equivalents of pure sodium hydroxide and slowly soluble in pure water. Then add one equivalent of EGTA (acid) and mix it for few minutes. The solution you obtain from chemical point of view is disodium EGTA- this what you need. Concentration depends on you. I guess there is certain reason why this agent is not common on market, for example it can be hygroscopic or not soluble in high concentration - you have to figure out solubility level. So, I suggest to use your sodium stock directly for your applications. Please always control pH.
Good luck
Artur
Hello Artur,
Thank you very much for the detailed answer. I appreciate your suggestion for preparing the chemical agent manually. Will update you sooner on the progress.
Thanks again
Durai
Hi,
You may make inquiry at Alfa Chemistry. They may provide the chemical.
https://www.alfa-chemistry.com/order.htm
- Badges
- Science topic