Sigma will not sell to individuals. You have to buy from a retailer. I ordered DTPA and a few other one-off, hard to source items from Alphachem in Canada, but a “custom” order like this is expensive. Probably not a viable option under the vast majority of circumstances.
I think talking directly with Artcraft is a better place to start. I’ve always found them helpful and responsive.
Sigma-Aldrich shows they can ship around September 27: https://www.sigmaaldrich.com/US/en/...ge=30&sort=relevance&term=Amidol&type=product
100 gm is $142.
I haven't dealt with Sigma-Aldrich myself but michael_r recently got some DTPA from them, see the D-76/ID-11 thread here.
David
Tried that. Was surprisingly difficult. You'd have to bark up a forest of trees to get a usable response.My advice for sourcing chemicals like this is to contact a chemical supply company on Alibaba. Tell them you need 2,4-Diaminophenol and they will likely be able to ship it to you for the cost of shipping + a few dollars.
It's hard to navigate between the increasing pressures of legislation and market forces that favor those companies that can ignore or evade legislation (i.e. the ones from China). I can't blame these companies for it.Sigma and it's associated companies are the worst in the business.
I wouldn't worry about chinese chemical supplies, they are very good at what they do, especially if they anticipate you will be a repeat customer.
How would he verify quality and purity ? That is often times an issue when buying chemistry.
It's hard to navigate between the increasing pressures of legislation and market forces that favor those companies that can ignore or evade legislation (i.e. the ones from China). I can't blame these companies for it.
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